Quatre champions valent-ils mieux qu’un ?<\/title>\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display&family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;600&display=swap\" rel=\"stylesheet\">\n<style>\n.naum-body{--creme:#f7f4ee;--encre:#2b2b2b;--rouge:#c0392b;--or:#b8863b;--trait:#e3ddd0;--gris:#6b665c;\n max-width:820px;margin:0 auto;padding:40px 22px 64px;background:var(--creme);color:var(--encre);\n font-family:\"DM Sans\",system-ui,sans-serif;font-size:18px;line-height:1.62;-webkit-font-smoothing:antialiased;}\n.naum-body *{box-sizing:border-box;}\n.naum-body .eyebrow{font-family:\"JetBrains Mono\",monospace;font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--or);margin:0 0 14px;}\n.naum-body h1{font-family:\"DM Serif 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h2{font-size:18px;border:none;padding:0;margin:0 0 8px;color:var(--encre);}\n.naum-body footer ul{margin:0;padding-left:20px;}\n@media(max-width:560px){\n .naum-body{font-size:16.5px;padding:28px 16px 48px;}\n .naum-body .stat b{font-size:25px;}\n .naum-body table.board7{font-size:12px;}\n .naum-body table.board7 td,.naum-body table.board7 th{padding:6px 5px;}\n}\n<\/style>\n<\/head>\n<body>\n<article class=\"naum-body\">\n<p class=\"eyebrow\">Laboratoire \u00b7 m\u00e9ta-moteur<\/p>\n<h1>Quatre champions valent-ils mieux qu’un ?<\/h1>\n<p class=\"chapeau\">Apr\u00e8s Orion, le trio de machines d\u00e9di\u00e9es, et Pl\u00e9iades, l’assembl\u00e9e de sept, voici Crux : quatre grands moteurs PC du d\u00e9but des ann\u00e9es 2000, Shredder 7, Fritz 9, Junior 8 et Hiarcs 8, et toujours Stockfish 18 en arbitre. Il vient de terminer un gauntlet de 150 parties contre des moteurs modernes. R\u00e9sultat : 3395 Elo, soit pr\u00e8s de 420 points au-dessus de son meilleur membre.<\/p>\n<div class=\"stats\">\n <div class=\"stat\"><b>3395<\/b><span>cote Ordo (\u00b130), 150 parties<\/span><\/div>\n <div class=\"stat\"><b>+478<\/b><span>au-dessus de la moyenne des 4 membres (2917)<\/span><\/div>\n <div class=\"stat\"><b>+419<\/b><span>au-dessus du meilleur membre, Shredder 7 (2976)<\/span><\/div>\n <div class=\"stat\"><b>3434<\/b><span>cote moyenne des 15 adversaires<\/span><\/div>\n<\/div>\n\n<h2><span class=\"lead-num\">1.<\/span>De Pl\u00e9iades \u00e0 Crux<\/h2>\n<p>Orion et Pl\u00e9iades ont montr\u00e9 qu’une assembl\u00e9e de vieilles machines d’\u00e9checs, d\u00e9partag\u00e9e par un arbitre, joue bien plus fort que chacun de ses membres. Mais leurs membres \u00e9taient faibles : 1788 de moyenne pour Orion, 2147 pour Pl\u00e9iades. La marge de progr\u00e8s \u00e9tait grande. La vraie question \u00e9tait de savoir si le principe tient encore quand les membres sont d\u00e9j\u00e0 tr\u00e8s forts, et que leurs erreurs deviennent rares et subtiles.<\/p>\n<p>Crux r\u00e9unit donc quatre moteurs qui ont domin\u00e9 les championnats et les listes de classement au tournant des ann\u00e9es 2000. Ce sont quatre auteurs, et quatre styles diff\u00e9rents :<\/p>\n<table>\n<thead><tr><th>Membre<\/th><th>Auteur<\/th><th class=\"num\">Cote (liste maison)<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Shredder 7<\/td><td>Stefan Meyer-Kahlen<\/td><td class=\"num\">2976<\/td><\/tr>\n<tr><td>Fritz 9<\/td><td>Frans Morsch et Mathias Feist<\/td><td class=\"num\">2970<\/td><\/tr>\n<tr><td>Hiarcs 8<\/td><td>Mark Uniacke<\/td><td class=\"num\">2873<\/td><\/tr>\n<tr><td>Junior 8<\/td><td>Amir Ban et Shay Bushinsky<\/td><td class=\"num\">2849<\/td><\/tr>\n<tr class=\"tot\"><td>Moyenne<\/td><td>quatre auteurs<\/td><td class=\"num\">2917<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n<h2><span class=\"lead-num\">2.<\/span>Comment \u00e7a marche<\/h2>\n<p>Le fonctionnement est le m\u00eame que pour Pl\u00e9iades. \u00c0 chaque coup, les quatre moteurs re\u00e7oivent la position et r\u00e9fl\u00e9chissent <strong>en parall\u00e8le<\/strong>, 15 secondes chacun. Si les quatre proposent le m\u00eame coup, il est jou\u00e9 directement. Sinon, <strong>Stockfish 18<\/strong> re\u00e7oit la liste des coups propos\u00e9s <em>(go searchmoves)<\/em>, r\u00e9fl\u00e9chit environ une seconde et choisit le meilleur. L’arbitre ne compte pas les voix : un coup propos\u00e9 par un seul membre peut l’emporter sur un coup propos\u00e9 par trois. Et il ne propose jamais de coup lui-m\u00eame : il ne choisit que parmi ceux des membres.<\/p>\n<div class=\"callout\">\n<b>Ce que dit le journal de Crux.<\/b> Pour chaque coup, Crux note la proposition de chaque membre, son \u00e9valuation, sa profondeur et son temps, puis le coup retenu. Sur les 150 parties, ce journal contient <b>12 095 d\u00e9cisions<\/b>. Pour mesurer la qualit\u00e9 des propositions, chaque position a ensuite \u00e9t\u00e9 r\u00e9\u00e9valu\u00e9e par Stockfish 17.1, coup propos\u00e9 par coup propos\u00e9. Ces mesures servent \u00e0 la section 5 et aux deux parties comment\u00e9es.\n<\/div>\n\n<h2><span class=\"lead-num\">3.<\/span>Les chiffres : deux gauntlets<\/h2>\n<p>Crux a d’abord jou\u00e9 un gauntlet de contr\u00f4le contre ses propres membres : <strong>93 points sur 100<\/strong>, soit une performance de 3372. Le m\u00e9ta-moteur \u00e9crase chacune de ses quatre t\u00eates jou\u00e9es seules. Il a ensuite affront\u00e9 une \u00e9chelle de quinze moteurs modernes, de 3310 \u00e0 3596, \u00e0 raison de dix parties contre chacun, avec les Blancs et avec les Noirs.<\/p>\n<table>\n<thead><tr><th>Adversaire<\/th><th class=\"num\">Score \/10<\/th><th class=\"num\">Performance<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Naum 4.2<\/td><td class=\"num\">7<\/td><td class=\"num\">3464<\/td><\/tr>\n<tr><td>SF 11 ARM9<\/td><td class=\"num\">6,5<\/td><td class=\"num\">3438<\/td><\/tr>\n<tr><td>Komodo64 3<\/td><td class=\"num\">6<\/td><td class=\"num\">3380<\/td><\/tr>\n<tr><td>Wasp 2.00<\/td><td class=\"num\">6<\/td><td class=\"num\">3386<\/td><\/tr>\n<tr><td>Strelka 5.5<\/td><td class=\"num\">6<\/td><td class=\"num\">3480<\/td><\/tr>\n<tr><td>Critter<\/td><td class=\"num\">5,5<\/td><td class=\"num\">3445<\/td><\/tr>\n<tr><td>Wasp 3.75<\/td><td class=\"num\">5<\/td><td class=\"num\">3403<\/td><\/tr>\n<tr><td>Senpai 2.0<\/td><td class=\"num\">4,5<\/td><td class=\"num\">3289<\/td><\/tr>\n<tr><td>Rebel-Extreme 1.1<\/td><td class=\"num\">4<\/td><td class=\"num\">3515<\/td><\/tr>\n<tr><td>Deep Rybka 4.1<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3319<\/td><\/tr>\n<tr><td>Gull 3<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3358<\/td><\/tr>\n<tr><td>Houdini 4<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3375<\/td><\/tr>\n<tr><td>Deep Shredder 13<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3425<\/td><\/tr>\n<tr><td>Wasp 5.50<\/td><td class=\"num\">1,5<\/td><td class=\"num\">3293<\/td><\/tr>\n<tr><td>Ethereal 11.75<\/td><td class=\"num\">1,5<\/td><td class=\"num\">3295<\/td><\/tr>\n<tr class=\"tot\"><td>Total<\/td><td class=\"num\">67,5 \/150<\/td><td class=\"num\">3395<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>Le bilan est de <strong>18 victoires, 99 nulles et 33 d\u00e9faites<\/strong>. Deux parties sur trois sont nulles : \u00e0 ce niveau, Crux d\u00e9fend tr\u00e8s bien, mais il gagne peu. Il est nettement plus \u00e0 l’aise avec les Blancs (36 sur 75, 10 victoires pour 13 d\u00e9faites) qu’avec les Noirs (31,5 sur 75, 8 victoires pour 20 d\u00e9faites). Les parties sont longues : 90 coups et 43 minutes en moyenne, soit plus de 106 heures de jeu au total. Les deux ouvertures les plus jou\u00e9es sont l’Espagnole (28 parties) et la Sicilienne (26).<\/p>\n<p>Ordo, qui p\u00e8se toutes les parties du laboratoire ensemble, donne <strong>3395<\/strong> : le niveau des moteurs modernes de l’\u00e9chelle, avec des membres qui ont une vingtaine d’ann\u00e9es de plus.<\/p>\n\n<h2><span class=\"lead-num\">4.<\/span>Comment Crux d\u00e9cide<\/h2>\n<p>Sur les 12 095 coups jou\u00e9s par Crux hors du livre d’ouvertures, les quatre membres \u00e9taient d’accord 3964 fois (<strong>33 %<\/strong>). Dans les deux tiers des cas, il a donc fallu trancher. Le plus souvent, il y avait deux candidats (4385 fois), puis trois (2837 fois). Les quatre membres ont propos\u00e9 quatre coups diff\u00e9rents 909 fois.<\/p>\n<table>\n<thead><tr><th>Membre<\/th><th class=\"num\">Coup retenu propos\u00e9<\/th><th class=\"num\">Seul \u00e0 le proposer<\/th><th class=\"num\">Isol\u00e9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Shredder 7<\/td><td class=\"num\">7787 (64,4 %)<\/td><td class=\"num\">975<\/td><td class=\"num\">2986<\/td><\/tr>\n<tr><td>Fritz 9<\/td><td class=\"num\">7659 (63,3 %)<\/td><td class=\"num\">953<\/td><td class=\"num\">3188<\/td><\/tr>\n<tr><td>Hiarcs 8<\/td><td class=\"num\">7561 (62,5 %)<\/td><td class=\"num\">871<\/td><td class=\"num\">2993<\/td><\/tr>\n<tr><td>Junior 8<\/td><td class=\"num\">7439 (61,5 %)<\/td><td class=\"num\">931<\/td><td class=\"num\">3366<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p class=\"small\">\u00ab Isol\u00e9 \u00bb : le membre propose un coup que personne d’autre ne propose. \u00ab Seul \u00e0 le proposer \u00bb : ce coup isol\u00e9 est retenu par l’arbitre.<\/p>\n<p>Les quatre membres p\u00e8sent presque autant les uns que les autres. Shredder est un peu plus souvent suivi, Junior un peu moins. Junior est aussi le membre le plus souvent isol\u00e9 (3366 fois) : c’est le plus original des quatre. Mais quand il est seul, il est retenu moins souvent que Shredder ou Fritz.<\/p>\n<p>Deux chiffres montrent que l’arbitre n’est pas un simple vote :<\/p>\n<div class=\"callout\">\n<b>La majorit\u00e9 est renvers\u00e9e presque une fois sur deux.<\/b> Dans les 6060 positions o\u00f9 un coup avait une majorit\u00e9 nette (3 contre 1, ou 2 contre 1 contre 1), l’arbitre a pr\u00e9f\u00e9r\u00e9 un coup minoritaire <b>2821 fois (46,5 %)<\/b>. Il y a eu en plus 1162 partages 2 contre 2, o\u00f9 un vote n’aurait pas pu trancher.<br>\n<b>Les paires qui s’entendent.<\/b> Shredder et Hiarcs sont la paire la plus souvent d’accord (6706 fois), Shredder et Junior la moins souvent (6274). Les deux \u00ab classiques \u00bb, Shredder et Hiarcs, pensent de fa\u00e7on proche. Junior, le moteur isra\u00e9lien r\u00e9put\u00e9 pour ses sacrifices, est celui qui apporte le plus de diversit\u00e9.\n<\/div>\n\n<h2><span class=\"lead-num\">5.<\/span>La pertinence de chaque membre<\/h2>\n<p>Le journal dit qui a \u00e9t\u00e9 suivi, pas qui avait raison. Pour le savoir, Stockfish 17.1 a r\u00e9\u00e9valu\u00e9 <strong>11 541<\/strong> positions de Crux et chaque coup propos\u00e9 dans chacune d’elles. Pour chaque proposition, on mesure la <em>perte<\/em> : l’\u00e9cart entre le meilleur coup de la position et le coup propos\u00e9, en centi\u00e8mes de pion (born\u00e9e \u00e0 3 pions pour qu’une seule gaffe ne fausse pas la moyenne).<\/p>\n<table>\n<thead><tr><th>Membre<\/th><th class=\"num\">Perte moyenne (cp)<\/th><th class=\"num\">Meilleure proposition<\/th><th class=\"num\">Gaffes propos\u00e9es (\u22651,5)<\/th><th class=\"num\">Gaffes jou\u00e9es<\/th><th class=\"num\">Coups d\u00e9cisifs seul<\/th><th class=\"num\">Erreur d’\u00e9valuation (cp)<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Shredder 7<\/td><td class=\"num\">11,7<\/td><td class=\"num\">83,1 %<\/td><td class=\"num\">138<\/td><td class=\"num\">44<\/td><td class=\"num\">30<\/td><td class=\"num\">63<\/td><\/tr>\n<tr><td>Fritz 9<\/td><td class=\"num\">11,2<\/td><td class=\"num\">83,6 %<\/td><td class=\"num\">123<\/td><td class=\"num\">42<\/td><td class=\"num\">59<\/td><td class=\"num\">42<\/td><\/tr>\n<tr><td>Junior 8<\/td><td class=\"num\">12,3<\/td><td class=\"num\">82,7 %<\/td><td class=\"num\">152<\/td><td class=\"num\">45<\/td><td class=\"num\">54<\/td><td class=\"num\">49<\/td><\/tr>\n<tr><td>Hiarcs 8<\/td><td class=\"num\">12,0<\/td><td class=\"num\">82,4 %<\/td><td class=\"num\">128<\/td><td class=\"num\">34<\/td><td class=\"num\">33<\/td><td class=\"num\">\u2013<\/td><\/tr>\n<tr class=\"tot\"><td>Crux (coup jou\u00e9)<\/td><td class=\"num\">7,0<\/td><td class=\"num\">\u2013<\/td><td class=\"num\">\u2013<\/td><td class=\"num\">69<\/td><td class=\"num\">\u2013<\/td><td class=\"num\">\u2013<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p class=\"small\">\u00ab Meilleure proposition \u00bb : le coup du membre est, \u00e0 5 centi\u00e8mes pr\u00e8s, le meilleur des coups propos\u00e9s. \u00ab Gaffes jou\u00e9es \u00bb : les gaffes du membre que Crux a effectivement jou\u00e9es. \u00ab Coups d\u00e9cisifs seul \u00bb : le membre est le seul \u00e0 proposer le coup retenu, et ce coup vaut au moins un demi-pion de plus que toutes les autres propositions. \u00ab Erreur d’\u00e9valuation \u00bb : l’\u00e9cart moyen entre l’\u00e9valuation annonc\u00e9e par le membre et celle de Stockfish, hors positions d\u00e9cid\u00e9es. Hiarcs 8 n’annonce pas son \u00e9valuation dans ce montage. Stockfish a analys\u00e9 environ 0,1 seconde par position : ces chiffres sont des ordres de grandeur.<\/p>\n<p>Le chiffre le plus important est en bas du tableau. Crux perd en moyenne <strong>7,0 centi\u00e8mes<\/strong> par coup. Son meilleur membre en perd 11,2. L’assembl\u00e9e fait donc environ <strong>38 % d’erreur en moins<\/strong> que le meilleur de ses membres. Les membres ont propos\u00e9 entre 123 et 152 gaffes chacun. Crux n’en a jou\u00e9 que 69. Dans 55 de ces cas, toutes les propositions \u00e9taient mauvaises : l’arbitre n’avait aucun bon coup \u00e0 choisir.<\/p>\n<p>Et si on avait simplement fait voter les quatre membres, sans arbitre ? On peut le simuler : le coup le plus propos\u00e9 est jou\u00e9, et en cas d’\u00e9galit\u00e9, celui du membre le mieux cot\u00e9. Ce Crux \u00ab d\u00e9mocratique \u00bb aurait perdu <strong>10,7 centi\u00e8mes<\/strong> par coup, presque autant qu’un membre seul, et jou\u00e9 112 gaffes au lieu de 69. Le vote moyenne les opinions, mais il ne trie pas les bonnes des mauvaises. C’est l’arbitre qui fait le gain.<\/p>\n<table>\n<thead><tr><th>Phase de jeu<\/th><th class=\"num\">Shredder<\/th><th class=\"num\">Fritz<\/th><th class=\"num\">Junior<\/th><th class=\"num\">Hiarcs<\/th><th class=\"num\">Crux<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Sortie du livre (avant le 20<sup>e<\/sup> coup)<\/td><td class=\"num\">15,0<\/td><td class=\"num\">13,5<\/td><td class=\"num\">15,3<\/td><td class=\"num\">15,1<\/td><td class=\"num\"><b>7,0<\/b><\/td><\/tr>\n<tr><td>Milieu de partie (coups 20 \u00e0 45)<\/td><td class=\"num\">14,9<\/td><td class=\"num\">13,9<\/td><td class=\"num\">14,7<\/td><td class=\"num\">15,8<\/td><td class=\"num\"><b>7,8<\/b><\/td><\/tr>\n<tr><td>Fin de partie (apr\u00e8s le 45<sup>e<\/sup> coup)<\/td><td class=\"num\">9,0<\/td><td class=\"num\">9,0<\/td><td class=\"num\">10,1<\/td><td class=\"num\">9,0<\/td><td class=\"num\"><b>6,5<\/b><\/td><\/tr>\n<\/tbody>\n<\/table>\n<p class=\"small\">Perte moyenne en centi\u00e8mes de pion, par phase de jeu. C’est en ouverture et au milieu de partie que l’arbitre apporte le plus : il y divise l’erreur par deux.<\/p>\n\n<h3>Portraits<\/h3>\n<p><strong>Fritz 9 est le membre le plus utile.<\/strong> C’est lui qui perd le moins par coup (11,2), qui propose le plus souvent le meilleur coup (83,6 %), qui a le plus de coups d\u00e9cisifs en solitaire (59) et qui s’\u00e9value avec le plus de justesse (erreur moyenne de 42 centi\u00e8mes). Dans la d\u00e9faite contre Ethereal, c’est aussi lui qui voit en premier que la partie est perdue.<\/p>\n<p><strong>Shredder 7 est le plus suivi.<\/strong> C’est le mieux cot\u00e9 des quatre et l’arbitre retient son coup plus souvent que celui des autres. Mais ses propositions ne sont pas meilleures que celles de Fritz (11,7 centi\u00e8mes perdus par coup), et ses \u00e9valuations sont celles qui s’\u00e9cartent le plus de Stockfish : 63 centi\u00e8mes d’\u00e9cart en moyenne, la plus forte erreur des trois membres mesur\u00e9s. Dans la victoire contre Naum, plus bas, c’est pourtant lui qui trouve seul le coup qui conclut.<\/p>\n<p><strong>Junior 8 est l’original.<\/strong> Il est le plus souvent isol\u00e9 et propose le plus de gaffes (152), mais il apporte aussi beaucoup d’id\u00e9es que personne d’autre ne voit : 54 coups d\u00e9cisifs en solitaire, presque autant que Fritz. Le 16\u2026b5 ! contre Naum, plus bas, est de lui. Sans arbitre, Junior serait un membre dangereux. Avec un arbitre, ses id\u00e9es deviennent un atout.<\/p>\n<p><strong>Hiarcs 8 est le plus prudent.<\/strong> Il est souvent d’accord avec Shredder, et ses gaffes sont celles qui passent le moins souvent : 34 jou\u00e9es sur 128 propos\u00e9es. Il compte 33 coups d\u00e9cisifs en solitaire. C’est le membre le plus discret. Il renforce surtout les bonnes majorit\u00e9s.<\/p>\n<p>Aucun membre n’est inutile. Chacun apporte des coups d\u00e9cisifs que les trois autres n’ont pas vus. C’est la condition pour qu’un m\u00e9ta-moteur fonctionne : des membres dont les erreurs ne se recoupent pas.<\/p>\n\n<h2><span class=\"lead-num\">6.<\/span>La partie la plus spectaculaire : Naum 4.2 \u2013 Crux, 0-1<\/h2>\n<p>Parmi les 18 victoires, celle-ci est la plus belle. Naum 4.2, avec les Blancs, roque du c\u00f4t\u00e9 de la Dame et lance ses pions sur le roi noir. Crux r\u00e9pond par une attaque de pions sur l’autre aile, plus rapide, et mate en 48 coups. Chaque membre y joue un r\u00f4le : l’id\u00e9e de Junior lance l’attaque, Fritz place les pi\u00e8ces, et Shredder trouve la conclusion. Un autre candidat \u00e9tait la victoire contre Rebel-Extreme 1.1, cot\u00e9 3585, mais elle s’est jou\u00e9e dans une longue finale termin\u00e9e par un mat au 116<sup>e<\/sup> coup : plus technique, moins spectaculaire.<\/p>\n<p class=\"small\">\u00c9chiquier vu du c\u00f4t\u00e9 de Crux (les Noirs). 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style=\"fill:var(--mm)\"><\/path><\/marker><marker id=\"crw-ah-ds\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ds)\"><\/path><\/marker><marker id=\"crw-ah-hi\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--hi)\"><\/path><\/marker><marker id=\"crw-ah-sf\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ink)\"><\/path><\/marker><marker id=\"crw-ah-pl\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--played)\"><\/path><\/marker>\n<\/defs><\/svg>\n<div class=\"wrap\">\n<div class=\"legend\"><span class=\"chip\"><i class=\"dot d-mm\"><\/i>Shredder 7<\/span><span class=\"chip\"><i class=\"dot d-fa\"><\/i>Fritz 9<\/span><span class=\"chip\"><i class=\"dot d-ds\"><\/i>Junior 8<\/span><span class=\"chip\"><i class=\"dot d-hi\"><\/i>Hiarcs 8<\/span><span class=\"chip\"><i class=\"dot d-pl\"><\/i>coup jou\u00e9<\/span><\/div>\n<div class=\"stats\" aria-label=\"Chiffres de la partie\">\n <div class=\"stat\"><span class=\"n\">39<\/span><span class=\"l\">coups de Crux apr\u00e8s le livre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">17 \/ 22<\/span><span class=\"l\">unanimes \/ tranch\u00e9s par l’arbitre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">5 \u00b7 3 \u00b7 1<\/span><span class=\"l\">coups retenus venus d’un seul membre : Fritz, Shredder, Junior<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">8<\/span><span class=\"l\">propositions \u00e9cart\u00e9es qui co\u00fbtaient plus d’un pion<\/span><\/div>\n<\/div>\n\n<section aria-labelledby=\"crw-t-graph\">\n <h2 id=\"crw-t-graph\">L’\u00e9valuation au fil de la partie<\/h2>\n <div class=\"graph\"><svg id=\"crw-graph\" viewBox=\"0 0 1000 190\" role=\"img\" aria-label=\"\u00c9valuation Stockfish du point de vue de Crux, coup par coup\"><\/svg><\/div>\n <p class=\"small\">\u00c9valuation Stockfish 17.1, du point de vue de Crux, born\u00e9e \u00e0 \u00b16 pions. Les points marquent les moments comment\u00e9s ; un clic place la partie \u00e0 ce coup.<\/p>\n<\/section>\n<section aria-labelledby=\"crw-t-mom\">\n <h2 id=\"crw-t-mom\">Les moments cl\u00e9s<\/h2>\n <p class=\"small\">Chaque diagramme montre la position avant le coup. Fl\u00e8ches : la proposition de chaque membre dans sa couleur, le coup jou\u00e9 en vert, et en pointill\u00e9 le coup de Stockfish quand aucun membre ne l’a propos\u00e9.<\/p>\n <div class=\"moments\" id=\"crw-moments\"><\/div>\n<\/section>\n<section aria-labelledby=\"crw-t-rep\">\n <h2 id=\"crw-t-rep\">Rejouer la partie<\/h2>\n <div class=\"replay\">\n <div class=\"board-col\">\n <div id=\"crw-board\"><\/div>\n <div class=\"controls\">\n <button id=\"crw-b-start\" type=\"button\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n <button id=\"crw-b-prev\" type=\"button\" aria-label=\"Coup pr\u00e9c\u00e9dent\">\u25c0<\/button>\n <button id=\"crw-b-next\" type=\"button\" aria-label=\"Coup suivant\">\u25b6<\/button>\n <button id=\"crw-b-end\" type=\"button\" aria-label=\"Fin\">\u23ed<\/button>\n <span class=\"cur\" id=\"crw-cur\"><\/span>\n <\/div>\n <div class=\"comment\" id=\"crw-comment\" aria-live=\"polite\"><\/div>\n <\/div>\n <div class=\"movelist\" id=\"crw-movelist\"><\/div>\n <\/div>\n <p class=\"small\">Fl\u00e8ches \u2190 \u2192 du clavier pour avancer et reculer.<\/p>\n<\/section>\n<footer><p>Sources : PGN du gauntlet (cutechess) et journal de Crux, qui note pour chaque coup la proposition et l’\u00e9valuation annonc\u00e9e par chaque membre (Hiarcs 8 n’annonce pas la sienne). \u00c9valuations de contr\u00f4le : Stockfish 17.1, environ 0,1 seconde par position, indicatives. Shredder donne ses mats sous forme d’un grand nombre, affich\u00e9 ici \u00ab mat \u00bb.<\/p><p>Cadences : Crux 60\/1800 (15 s par membre et environ 1 s d’arbitre par coup), adversaire 60\/900.<\/p><\/footer>\n<\/div>\n<\/div>\n<script>\n(function(){\nconst 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Les quatre membres de Crux r\u00e9pondent pareil : 12\u2026g5, qui bloque l'aile roi. L'arbitre n'est pas consult\u00e9. Stockfish trouve aussi ce coup.\"},{\"ply\":31,\"tag\":\"\",\"title\":\"16\u2026b5 ! L'id\u00e9e de Junior seul\",\"text\":\"Naum a roqu\u00e9 du c\u00f4t\u00e9 de la Dame et pouss\u00e9 g4. Shredder et Hiarcs voulaient ouvrir le centre (cxd4, +0,94), Fritz jouer Tb8 (+0,99). Junior, seul, propose de lancer le pion b sur le roque adverse : Stockfish l'\u00e9value \u00e0 +1,39 et l'arbitre le retient. C'est le coup qui donne son sens \u00e0 la partie : c'est d\u00e9sormais une course entre deux attaques de pions, et c'est Crux qui va le plus vite.\"},{\"ply\":35,\"tag\":\"\",\"title\":\"18\u2026Tb8, Fritz contre tous\",\"text\":\"Quatre membres, quatre coups diff\u00e9rents. Shredder voulait b4 (+0,82), Hiarcs Rg8 (+1,26), Junior Fb7 (+1,50). Fritz propose Tb8, qui met la tour sur la colonne qui va s'ouvrir : +1,73. L'arbitre le suit. Dans cette partie, Fritz est le membre dont le coup a \u00e9t\u00e9 retenu seul le plus souvent, 5 fois.\"},{\"ply\":39,\"tag\":\"\",\"title\":\"20\u2026Cb6, encore Fritz\",\"text\":\"Shredder et Hiarcs voulaient prendre en f3 (+1,26), Junior jouer a6 (+1,32). Fritz, seul, ram\u00e8ne le cavalier vers d5 : +1,88. Une majorit\u00e9 de deux voix est \u00e9cart\u00e9e par l'arbitre. Dans le gauntlet, cela arrive presque une fois sur deux.\"},{\"ply\":45,\"tag\":\"\",\"title\":\"23\u2026Fe4+ : trois contre un\",\"text\":\"Le cavalier a \u00e9t\u00e9 \u00e9chang\u00e9 en c3, la diagonale h1-a8 est \u00e0 Crux. Shredder voulait se replier en g2 (+1,90). Les trois autres donnent l'\u00e9chec en e4 (+2,57), qui chasse le roi blanc en a1. Ici, la majorit\u00e9 a raison et l'arbitre la suit.\"},{\"ply\":69,\"tag\":\"\",\"title\":\"35\u2026fxe5 : deux contre deux\",\"text\":\"Partage parfait. Junior et Hiarcs veulent prendre en g5 (hxg5, +2,09 seulement). Shredder et Fritz pr\u00e9f\u00e8rent fxe5 (+4,23). L'arbitre ne compte pas les voix : il fait chercher Stockfish une seconde parmi les coups propos\u00e9s, et il prend celui qui vaut deux pions de plus.\"},{\"ply\":77,\"tag\":\"\",\"title\":\"39\u2026Ta8 ! Shredder voit le mat\",\"text\":\"Fritz voulait Tb4 (+4,92), Junior Db4 (+5,43), Hiarcs Da7 (+5,59). Shredder, seul, propose Ta8 et l'annonce \u00e0 +11,08 : il a vu que la tour, pass\u00e9e sur la colonne a, va achever le roi blanc. Stockfish confirme (+7,28) et l'arbitre retient le coup. Deux coups plus tard, les membres annoncent un mat.\"},{\"ply\":95,\"tag\":\"\",\"title\":\"48\u2026Fxd4#\",\"text\":\"Le roi blanc est traqu\u00e9 jusqu'en c3 et le fou donne le mat. Naum 4.2, contre qui Crux marque 7 sur 10, est battu en 48 coups avec les Noirs. C'est une attaque de pions men\u00e9e sur le roque adverse, et chacun des quatre membres a donn\u00e9 au moins un coup d\u00e9cisif.\"}],\"ids\":{\"P\":\"crw-white-pawn\",\"N\":\"crw-white-knight\",\"B\":\"crw-white-bishop\",\"R\":\"crw-white-rook\",\"Q\":\"crw-white-queen\",\"K\":\"crw-white-king\",\"p\":\"crw-black-pawn\",\"n\":\"crw-black-knight\",\"b\":\"crw-black-bishop\",\"r\":\"crw-black-rook\",\"q\":\"crw-black-queen\",\"k\":\"crw-black-king\"}};\nconst NS=\"http:\/\/www.w3.org\/2000\/svg\";\nconst COL={SH:\"mm\",FR:\"fa\",JU:\"ds\",HI:\"hi\"};const FLIP=true;\nconst NAME={SH:\"Shredder 7\",FR:\"Fritz 9\",JU:\"Junior 8\",HI:\"Hiarcs 8\"};\nconst START=\"rnbqkbnr\/pppppppp\/8\/8\/8\/8\/PPPPPPPP\/RNBQKBNR\";\nconst fenBefore=i=>i<=0?START:D.plies[i-1].fen;\nfunction moveLabel(i){const n=Math.floor(i\/2)+1;return i%2===0?n+\".\":n+\"\u2026\"}\nfunction fmt(v){if(v===null||v===undefined)return\"\u2013\";if(Math.abs(v)>=9000)return v>0?\"mat\":\"\u2212mat\";const s=(v\/100).toFixed(2).replace(\".\",\",\");return(v>0?\"+\":v<0?\"\u2212\":\"\")+s.replace(\"-\",\"\")}\nfunction sqXY(s){let f=s.charCodeAt(0)-97,k=+s[1];if(FLIP){f=7-f;k=9-k}return[f*45+22.5,(8-k)*45+22.5]}\nfunction boardSVG(fen,arrows,last){\n const svg=document.createElementNS(NS,\"svg\");svg.setAttribute(\"viewBox\",\"0 0 360 360\");svg.setAttribute(\"class\",\"bd\");svg.setAttribute(\"role\",\"img\");\n let h=\"\";\n for(let r=0;r<8;r++)for(let f=0;f<8;f++){const light=(r+f)%2===0;h+=`<rect x=\"${f*45}\" y=\"${r*45}\" width=\"45\" height=\"45\" style=\"fill:var(${light?\"--sq-light\":\"--sq-dark\"})\"\/>`}\n if(last){for(const s of[last.slice(0,2),last.slice(2,4)]){const[x,y]=sqXY(s);h+=`<rect x=\"${x-22.5}\" y=\"${y-22.5}\" width=\"45\" height=\"45\" style=\"fill:var(--played)\" opacity=\".28\"\/>`}}\n for(let f=0;f<8;f++)h+=`<text x=\"${f*45+41}\" y=\"356\" font-size=\"8\" text-anchor=\"end\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${\"abcdefgh\"[FLIP?7-f:f]}<\/text>`;\n for(let r=0;r<8;r++)h+=`<text x=\"2\" y=\"${r*45+9}\" font-size=\"8\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${FLIP?r+1:8-r}<\/text>`;\n const rows=fen.split(\"\/\");\n rows.forEach((row,r)=>{let f=0;for(const c of row){if(\/\\d\/.test(c)){f+=+c;continue}h+=`<use href=\"#${D.ids[c]}\" transform=\"translate(${(FLIP?7-f:f)*45},${(FLIP?7-r:r)*45})\"\/>`;f++}});\n (arrows||[]).forEach((a,k)=>{const[x1,y1]=sqXY(a.uci.slice(0,2)),[x2,y2]=sqXY(a.uci.slice(2,4));const dx=x2-x1,dy=y2-y1,L=Math.hypot(dx,dy)||1;const off=a.off||0;const ox=-dy\/L*off,oy=dx\/L*off;const ex=x2-dx\/L*12,ey=y2-dy\/L*12;\n h+=`<line x1=\"${x1+ox}\" y1=\"${y1+oy}\" x2=\"${ex+ox}\" y2=\"${ey+oy}\" style=\"stroke:var(--${a.col===\"pl\"?\"played\":a.col===\"sf\"?\"ink\":a.col})\" stroke-width=\"${a.w||6}\" stroke-linecap=\"round\" ${a.dash?'stroke-dasharray=\"6 6\"':''} opacity=\"${a.op||.85}\" marker-end=\"url(#crw-ah-${a.col})\"\/>`});\n svg.innerHTML=h;return svg}\nfunction arrowsFor(i){\n const p=D.plies[i];const out=[];const seen={};\n (p.props||[]).forEach(([who,san,uci])=>{if(uci===\"-\"||uci===p.uci)return;seen[uci]=(seen[uci]||0)+1;const n=seen[uci]-1;out.push({uci,col:COL[who],off:n*5-2,w:5,op:.8})});\n out.push({uci:p.uci,col:\"pl\",w:7,op:.9});\n if(p.props&&p.bestu&&!p.props.some(x=>x[2]===p.bestu))out.push({uci:p.bestu,col:\"sf\",w:4,op:.9,dash:1});return out}\nfunction propsTable(i){\n const p=D.plies[i];if(!p.props)return\"\";\n let h='<table class=\"props\"><thead><tr><th>Membre<\/th><th>Coup<\/th><th class=\"num\">Machine<\/th><th class=\"num\">Stockfish<\/th><\/tr><\/thead><tbody>';\n p.props.forEach(([who,san,uci,ev,sf])=>{const ch=uci===p.uci;h+=`<tr class=\"${ch?\"chosen\":\"\"}\"><td><span class=\"chip\"><i class=\"dot d-${COL[who]}\"><\/i>${NAME[who]}<\/span><\/td><td>${san}${ch?\" \u2713\":\"\"}<\/td><td class=\"num\" title=\"\u00e9valuation annonc\u00e9e par la machine\">${ev===\"?\"?\"\u2013\":ev.replace(\"-\",\"\u2212\").replace(\".\",\",\")}<\/td><td class=\"num ${sf>0?\"pos\":sf<0?\"neg\":\"\"}\" title=\"Stockfish\">${fmt(sf)}<\/td><\/tr>`});\n h+='<\/tbody><\/table>';if(p.best&&!p.props.some(x=>x[2]===p.bestu))h+=`<div class=\"small\">Coup de Stockfish, propos\u00e9 par personne : <b>${p.best}<\/b> (fl\u00e8che en pointill\u00e9).<\/div>`;return h}\n\/\/ moments\nconst momByPly={};D.moments.forEach(m=>momByPly[m.ply]=m);\nconst mc=document.getElementById(\"crw-moments\");\nD.moments.forEach(m=>{const i=m.ply,p=D.plies[i];const card=document.createElement(\"article\");card.className=\"moment\";\n const bd=document.createElement(\"div\");bd.className=\"bd\";bd.appendChild(boardSVG(fenBefore(i),arrowsFor(i)));\n const tx=document.createElement(\"div\");tx.className=\"txt\";\n tx.innerHTML=`<span class=\"tag\">${moveLabel(i)}${p.san} \u00b7 Stockfish apr\u00e8s le coup ${fmt(p.ev)}<\/span><h3>${m.title}<\/h3><p>${m.text}<\/p>${propsTable(i)}<button type=\"button\" data-go=\"${i}\">Voir dans la partie<\/button>`;\n card.append(bd,tx);mc.appendChild(card)});\nmc.addEventListener(\"click\",e=>{const b=e.target.closest(\"[data-go]\");if(b){go(+b.dataset.go);document.getElementById(\"crw-t-rep\").scrollIntoView({behavior:\"smooth\"})}});\n\/\/ graph\n(function(){const g=document.getElementById(\"crw-graph\");const n=D.plies.length;const W=1000,H=190,L=34,R=8,T=10,B=24;\n const x=i=>L+(W-L-R)*i\/(n-1),y=v=>{v=Math.max(-600,Math.min(600,v));return T+(H-T-B)*(1-(v+600)\/1200)};\n let h=\"\";[-600,-300,0,300,600].forEach(v=>{h+=`<line x1=\"${L}\" x2=\"${W-R}\" y1=\"${y(v)}\" y2=\"${y(v)}\" style=\"stroke:var(--line)\" stroke-width=\"${v===0?1.5:1}\"\/><text x=\"${L-6}\" y=\"${y(v)+3}\" text-anchor=\"end\">${v>0?\"+\":\"\"}${v\/100}<\/text>`});\n for(let m=10;m<=Math.ceil(n\/2);m+=10){const i=2*(m-1);h+=`<text x=\"${x(i)}\" y=\"${H-6}\" text-anchor=\"middle\">${m}<\/text>`}\n const pts=D.plies.map((p,i)=>`${x(i).toFixed(1)},${y(p.ev).toFixed(1)}`);\n h+=`<path d=\"M${x(0)},${y(0)} L${pts.join(\" L\")} L${x(n-1)},${y(0)} Z\" style=\"fill:var(--played)\" opacity=\".14\"\/>`;\n h+=`<polyline points=\"${pts.join(\" \")}\" style=\"fill:none;stroke:var(--played)\" stroke-width=\"2\"\/>`;\n D.moments.forEach(m=>{const i=m.ply;h+=`<circle cx=\"${x(i)}\" cy=\"${y(D.plies[i].ev)}\" r=\"5\" style=\"fill:var(--surface);stroke:var(--ink);cursor:pointer\" stroke-width=\"1.5\" data-go=\"${i}\"><title>${moveLabel(i)}${D.plies[i].san} \u2014 ${m.title}<\/title><\/circle>`});\n g.innerHTML=h;g.addEventListener(\"click\",e=>{const c=e.target.closest(\"[data-go]\");if(c){go(+c.dataset.go)}})})();\n\/\/ move list\nconst ml=document.getElementById(\"crw-movelist\");const btns=[];\nfor(let i=0;i<D.plies.length;i+=2){const no=document.createElement(\"div\");no.className=\"no\";no.textContent=(i\/2+1)+\".\";ml.appendChild(no);\n for(const j of[i,i+1]){if(j>=D.plies.length){ml.appendChild(document.createElement(\"div\"));continue}const p=D.plies[j];const b=document.createElement(\"button\");b.type=\"button\";b.className=\"mv\"+(momByPly[j]?\" key\":\"\");\n let mk=\"\";if(p.mode){mk=`<i class=\"mk\" style=\"background:${p.mode===\"unanime\"?\"var(--line)\":\"var(--played)\"}\" title=\"${p.mode}\"><\/i>`}\n b.innerHTML=`${p.san}${mk}`;b.addEventListener(\"click\",()=>go(j));ml.appendChild(b);btns[j]=b}}\nlet cur=-1;\nfunction go(i){cur=Math.max(-1,Math.min(D.plies.length-1,i));render()}\nfunction render(){const bd=document.getElementById(\"crw-board\");bd.innerHTML=\"\";\n const fen=cur<0?START:D.plies[cur].fen;bd.appendChild(boardSVG(fen,[],cur>=0?D.plies[cur].uci:null));\n btns.forEach(b=>b&&b.classList.remove(\"on\"));if(cur>=0&&btns[cur]){btns[cur].classList.add(\"on\");{const L=document.getElementById(\"crw-movelist\"),B=btns[cur];L.scrollTop+=B.getBoundingClientRect().top-L.getBoundingClientRect().top-L.clientHeight\/2}}\n const c=document.getElementById(\"crw-comment\");document.getElementById(\"crw-cur\").textContent=cur<0?\"position initiale\":`${moveLabel(cur)}${D.plies[cur].san}`;\n if(cur<0){c.innerHTML='<p>Position initiale. Avance avec \u25b6 ou clique un coup.<\/p>';return}\n const p=D.plies[cur],m=momByPly[cur];let h=\"\";\n if(m)h+=`<h3>${m.title}<\/h3><p>${m.text}<\/p>`;\n if(p.book)h+='<p class=\"small\">Coup du livre d\\'ouvertures.<\/p>';\n else if(p.props){h+=`<p class=\"small\">${p.mode===\"unanime\"?\"Les quatre membres sont d'accord : l'arbitre n'est pas consult\u00e9.\":\"Les membres divergent : l'arbitre tranche.\"}<\/p>`+propsTable(cur)}\n else if(p.mode)h+=`<p class=\"small\">${p.mode}<\/p>`;\n else h+=`<p class=\"small\">Coup de Naum 4.2.<\/p>`;\n h+=`<p class=\"small\">Stockfish apr\u00e8s le coup : ${fmt(p.ev)}${p.best&&p.best!==p.san?` \u00b7 son coup : ${p.best}`:\"\"}<\/p>`;\n c.innerHTML=h}\ndocument.getElementById(\"crw-b-start\").onclick=()=>go(-1);document.getElementById(\"crw-b-prev\").onclick=()=>go(cur-1);\ndocument.getElementById(\"crw-b-next\").onclick=()=>go(cur+1);document.getElementById(\"crw-b-end\").onclick=()=>go(D.plies.length-1);\ndocument.addEventListener(\"keydown\",e=>{const R=document.getElementById(\"crw-board\").getBoundingClientRect();if(R.bottom<0||R.top>innerHeight)return;if(e.target.closest(\"input,textarea\"))return;if(e.key===\"ArrowRight\"){go(cur+1);e.preventDefault()}if(e.key===\"ArrowLeft\"){go(cur-1);e.preventDefault()}});\ngo(31);\n})();\n<\/script>\n\n<h2><span class=\"lead-num\">7.<\/span>La d\u00e9faite la plus spectaculaire : Crux \u2013 Ethereal 11.75, 0-1<\/h2>\n<p>Crux a perdu 33 parties. Celle-ci montre le mieux sa faiblesse. Ethereal, avec les Noirs, sacrifie la qualit\u00e9 dans une Najdorf. Les quatre membres de Crux comptent le mat\u00e9riel et se croient mieux. Stockfish, lui, voit les Noirs mieux d\u00e8s le sacrifice. L’arbitre sauve plusieurs fois ce qui peut l’\u00eatre en \u00e9cartant les pires coups, mais il ne peut pas inventer un plan que personne ne propose. Le roi blanc tombe au 42<sup>e<\/sup> coup.<\/p>\n<p>C’est la limite d’un m\u00e9ta-moteur : <strong>quand tous les membres se trompent de la m\u00eame fa\u00e7on, l’arbitre ne peut rien faire.<\/strong> Quatre moteurs du d\u00e9but des ann\u00e9es 2000 partagent les m\u00eames id\u00e9es sur la valeur du mat\u00e9riel, et Ethereal en a profit\u00e9.<\/p>\n<style>\n@import url(\"https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@500;600;700&family=Literata:opsz,wght@7..72,400;7..72,600&family=JetBrains+Mono:wght@400;600&display=swap\");\n.naum-body .crl{--bg:#f2f4f1; --surface:#ffffff; --ink:#1c2420; --muted:#5d6a63; --line:#d5dbd5;\n --sq-light:#e4e7da; --sq-dark:#86997a; --coord:#4a5a50;\n --played:#0e6f5f; --fa:#2c66b0; --mm:#b13636; --ds:#b07c0a; --hi:#7b4fa6;\n --good:#1f7a4d; --bad:#b13636;\n --f-display:\"Barlow Condensed\",\"Arial Narrow\",Arial,sans-serif;\n --f-body:\"Literata\",Georgia,\"Times New Roman\",serif;\n --f-mono:\"JetBrains 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stroke-linecap=\"butt\"><\/path><path d=\"M11 29a35 35 1 0 1 23 0M12.5 31.5h20M11.5 34.5a35 35 1 0 0 22 0M10.5 37.5a35 35 1 0 0 24 0\" fill=\"none\" stroke=\"#fff\"><\/path><\/g><g id=\"crl-black-king\" class=\"black king\" fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22.5 11.63V6\" stroke-linejoin=\"miter\"><\/path><path d=\"M22.5 25s4.5-7.5 3-10.5c0 0-1-2.5-3-2.5s-3 2.5-3 2.5c-1.5 3 3 10.5 3 10.5\" fill=\"#000\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\"><\/path><path d=\"M11.5 37c5.5 3.5 15.5 3.5 21 0v-7s9-4.5 6-10.5c-4-6.5-13.5-3.5-16 4V27v-3.5c-3.5-7.5-13-10.5-16-4-3 6 5 10 5 10V37z\" fill=\"#000\"><\/path><path d=\"M20 8h5\" stroke-linejoin=\"miter\"><\/path><path d=\"M32 29.5s8.5-4 6.03-9.65C34.15 14 25 18 22.5 24.5l.01 2.1-.01-2.1C20 18 9.906 14 6.997 19.85c-2.497 5.65 4.853 9 4.853 9M11.5 30c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0\" stroke=\"#fff\"><\/path><\/g>\n<marker id=\"crl-ah-fa\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--fa)\"><\/path><\/marker><marker id=\"crl-ah-mm\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--mm)\"><\/path><\/marker><marker id=\"crl-ah-ds\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ds)\"><\/path><\/marker><marker id=\"crl-ah-hi\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--hi)\"><\/path><\/marker><marker id=\"crl-ah-sf\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ink)\"><\/path><\/marker><marker id=\"crl-ah-pl\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--played)\"><\/path><\/marker>\n<\/defs><\/svg>\n<div class=\"wrap\">\n<div class=\"legend\"><span class=\"chip\"><i class=\"dot d-mm\"><\/i>Shredder 7<\/span><span class=\"chip\"><i class=\"dot d-fa\"><\/i>Fritz 9<\/span><span class=\"chip\"><i class=\"dot d-ds\"><\/i>Junior 8<\/span><span class=\"chip\"><i class=\"dot d-hi\"><\/i>Hiarcs 8<\/span><span class=\"chip\"><i class=\"dot d-pl\"><\/i>coup jou\u00e9<\/span><\/div>\n<div class=\"stats\" aria-label=\"Chiffres de la partie\">\n <div class=\"stat\"><span class=\"n\">33<\/span><span class=\"l\">coups de Crux apr\u00e8s le livre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">16 \/ 17<\/span><span class=\"l\">unanimes \/ tranch\u00e9s par l’arbitre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">2 \u00b7 2 \u00b7 2<\/span><span class=\"l\">coups retenus venus d’un seul membre : Shredder, Fritz, Junior<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">3<\/span><span class=\"l\">propositions \u00e9cart\u00e9es qui co\u00fbtaient plus d’un pion<\/span><\/div>\n<\/div>\n\n<section aria-labelledby=\"crl-t-graph\">\n <h2 id=\"crl-t-graph\">L’\u00e9valuation au fil de la partie<\/h2>\n <div class=\"graph\"><svg id=\"crl-graph\" viewBox=\"0 0 1000 190\" role=\"img\" aria-label=\"\u00c9valuation Stockfish du point de vue de Crux, coup par coup\"><\/svg><\/div>\n <p class=\"small\">\u00c9valuation Stockfish 17.1, du point de vue de Crux, born\u00e9e \u00e0 \u00b16 pions. Les points marquent les moments comment\u00e9s ; un clic place la partie \u00e0 ce coup.<\/p>\n<\/section>\n<section aria-labelledby=\"crl-t-mom\">\n <h2 id=\"crl-t-mom\">Les moments cl\u00e9s<\/h2>\n <p class=\"small\">Chaque diagramme montre la position avant le coup. Fl\u00e8ches : la proposition de chaque membre dans sa couleur, le coup jou\u00e9 en vert, et en pointill\u00e9 le coup de Stockfish quand aucun membre ne l’a propos\u00e9.<\/p>\n <div class=\"moments\" id=\"crl-moments\"><\/div>\n<\/section>\n<section aria-labelledby=\"crl-t-rep\">\n <h2 id=\"crl-t-rep\">Rejouer la partie<\/h2>\n <div class=\"replay\">\n <div class=\"board-col\">\n <div id=\"crl-board\"><\/div>\n <div class=\"controls\">\n <button id=\"crl-b-start\" type=\"button\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n <button id=\"crl-b-prev\" type=\"button\" aria-label=\"Coup pr\u00e9c\u00e9dent\">\u25c0<\/button>\n <button id=\"crl-b-next\" type=\"button\" aria-label=\"Coup suivant\">\u25b6<\/button>\n <button id=\"crl-b-end\" type=\"button\" aria-label=\"Fin\">\u23ed<\/button>\n <span class=\"cur\" id=\"crl-cur\"><\/span>\n <\/div>\n <div class=\"comment\" id=\"crl-comment\" aria-live=\"polite\"><\/div>\n <\/div>\n <div class=\"movelist\" id=\"crl-movelist\"><\/div>\n <\/div>\n <p class=\"small\">Fl\u00e8ches \u2190 \u2192 du clavier pour avancer et reculer.<\/p>\n<\/section>\n<footer><p>Sources : PGN du gauntlet (cutechess) et journal de Crux, qui note pour chaque coup la proposition et l’\u00e9valuation annonc\u00e9e par chaque membre (Hiarcs 8 n’annonce pas la sienne). \u00c9valuations de contr\u00f4le : Stockfish 17.1, environ 0,1 seconde par position, indicatives. Shredder donne ses mats sous forme d’un grand nombre, affich\u00e9 ici \u00ab mat \u00bb.<\/p><p>Cadences : Crux 60\/1800 (15 s par membre et environ 1 s d’arbitre par coup), adversaire 60\/900.<\/p><\/footer>\n<\/div>\n<\/div>\n<script>\n(function(){\nconst 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3\",-9998],[\"HI\",\"Rg1\",\"f1g1\",\"?\",-9998]],\"ev\":-9998,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P4q2\/2P1rB2\/R5K1\"},{\"san\":\"Dxf2+\",\"uci\":\"f3f2\",\"best\":\"Dxf2+\",\"bestu\":\"f3f2\",\"ev\":-9999,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P7\/2P1rq2\/R5K1\"},{\"san\":\"Rh1\",\"uci\":\"g1h1\",\"best\":\"Rh1\",\"bestu\":\"g1h1\",\"mode\":\"unanime\",\"props\":[[\"SH\",\"Rh1\",\"g1h1\",\"\u2212mat\",-9999],[\"FR\",\"Rh1\",\"g1h1\",\"\u2212mat 1\",-9999],[\"JU\",\"Rh1\",\"g1h1\",\"\u2212mat 3\",-9999],[\"HI\",\"Rh1\",\"g1h1\",\"?\",-9999]],\"ev\":-9999,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P7\/2P1rq2\/R6K\"},{\"san\":\"Dg2#\",\"uci\":\"f2g2\",\"best\":\"Dg2#\",\"bestu\":\"f2g2\",\"ev\":-10000,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P7\/2P1r1q1\/R6K\"}],\"moments\":[{\"ply\":27,\"tag\":\"\",\"title\":\"14\u2026Txc3 ! Le sacrifice de qualit\u00e9\",\"text\":\"Une Najdorf classique, attaque anglaise. Ethereal donne sa tour pour le cavalier c3, puis prend le pion e4 au coup suivant. Pour le mat\u00e9riel, Crux gagne la qualit\u00e9. Mais les pi\u00e8ces noires deviennent tr\u00e8s actives, et Stockfish donne d\u00e9j\u00e0 l'avantage aux Noirs.\"},{\"ply\":34,\"tag\":\"\",\"title\":\"18.Ff2 : l'angle mort commun\",\"text\":\"Coup unanime. Shredder s'\u00e9value \u00e0 +0,52, Junior \u00e0 +0,83. Stockfish voit \u22120,54. Les quatre membres comptent la qualit\u00e9 d'avance et ne voient pas que le cavalier f5, le fou e6 et le pion e5 valent plus. Ce n'est pas un probl\u00e8me de vote : quand les quatre se trompent dans le m\u00eame sens, l'arbitre ne peut que choisir le moins mauvais coup.\"},{\"ply\":36,\"tag\":\"\",\"title\":\"19.Cd4 : l'arbitre sauve ce qui peut l'\u00eatre\",\"text\":\"Shredder, Junior et Hiarcs veulent prendre le pion a6 avec la Dame (+1,14 selon Shredder) : selon Stockfish, c'est \u22121,84. Fritz, seul, propose Cd4 (\u22120,50). L'arbitre \u00e9carte la majorit\u00e9 de trois voix et prend le coup de Fritz. Sans arbitre, Crux aurait perdu un pion et demi de plus d\u00e8s ce moment.\"},{\"ply\":43,\"tag\":\"\",\"title\":\"22\u2026Fxh3 ! Ethereal ouvre le roi\",\"text\":\"Le fou noir prend h3 et entame le roque blanc. Les membres de Crux s'\u00e9valuent toujours autour de z\u00e9ro ou en positif (Shredder +0,70). Stockfish voit \u22121,4. \u00c0 partir de l\u00e0, la courbe ne fera que descendre.\"},{\"ply\":44,\"tag\":\"\",\"title\":\"23.Dxd6 contre Dxa6\",\"text\":\"Encore le pion a6. Junior et Hiarcs veulent le prendre (\u22122,86). Shredder et Fritz pr\u00e9f\u00e8rent Dxd6 (\u22121,42). Les deux camps ont le m\u00eame nombre de voix et l'arbitre choisit le moindre mal. Pendant toute la partie, Crux a r\u00e9ussi \u00e0 \u00e9viter les pires coups. Il n'a jamais trouv\u00e9 de bon plan.\"},{\"ply\":50,\"tag\":\"\",\"title\":\"26.Rf1 : quatre avis, aucun bon\",\"text\":\"Chaque membre propose un coup diff\u00e9rent : Rf1 (Shredder, \u22123,07), Td2 (Fritz et Hiarcs, \u22123,48), a4 (Junior, \u22124,35). Shredder s'\u00e9value encore \u00e0 \u22120,66, alors que Stockfish voit trois pions de retard. Tant que tous les membres se trompent sur la position, l'arbitre n'y peut rien : il ne choisit que parmi leurs coups.\"},{\"ply\":64,\"tag\":\"\",\"title\":\"33.Dd3 : Fritz voit, Shredder non\",\"text\":\"Coup unanime, mais les \u00e9valuations n'ont plus rien \u00e0 voir entre elles. Shredder annonce 0,00, Junior \u22123,80 et Fritz \u221210,05. Fritz a compris que la partie est perdue. Shredder ne le voit pas encore.\"},{\"ply\":71,\"tag\":\"\",\"title\":\"36\u2026f3 !\",\"text\":\"36.b4 \u00e9tait la proposition de Shredder, mais peu importe : tous les coups perdent, et Fritz annonce un mat en 19. Le pion f noir avance en f3 et casse le roque blanc. Ensuite, tout est forc\u00e9 : Dxf3 Fxf3, gxf3 Dxf3+, Tf2 Fxf2.\"},{\"ply\":83,\"tag\":\"\",\"title\":\"42\u2026Dg2#\",\"text\":\"Mat en 42 coups. Ethereal 11.75, contre qui Crux ne marque que 1,5 sur 10, l'a battu avec un sacrifice positionnel que les quatre membres ont mal \u00e9valu\u00e9 ensemble. C'est le genre de d\u00e9faite qu'un m\u00e9ta-moteur ne peut pas \u00e9viter : l'arbitre ne voit que les coups qu'on lui propose.\"}],\"ids\":{\"P\":\"crl-white-pawn\",\"N\":\"crl-white-knight\",\"B\":\"crl-white-bishop\",\"R\":\"crl-white-rook\",\"Q\":\"crl-white-queen\",\"K\":\"crl-white-king\",\"p\":\"crl-black-pawn\",\"n\":\"crl-black-knight\",\"b\":\"crl-black-bishop\",\"r\":\"crl-black-rook\",\"q\":\"crl-black-queen\",\"k\":\"crl-black-king\"}};\nconst NS=\"http:\/\/www.w3.org\/2000\/svg\";\nconst COL={SH:\"mm\",FR:\"fa\",JU:\"ds\",HI:\"hi\"};const FLIP=false;\nconst NAME={SH:\"Shredder 7\",FR:\"Fritz 9\",JU:\"Junior 8\",HI:\"Hiarcs 8\"};\nconst START=\"rnbqkbnr\/pppppppp\/8\/8\/8\/8\/PPPPPPPP\/RNBQKBNR\";\nconst fenBefore=i=>i<=0?START:D.plies[i-1].fen;\nfunction moveLabel(i){const n=Math.floor(i\/2)+1;return i%2===0?n+\".\":n+\"\u2026\"}\nfunction fmt(v){if(v===null||v===undefined)return\"\u2013\";if(Math.abs(v)>=9000)return v>0?\"mat\":\"\u2212mat\";const s=(v\/100).toFixed(2).replace(\".\",\",\");return(v>0?\"+\":v<0?\"\u2212\":\"\")+s.replace(\"-\",\"\")}\nfunction sqXY(s){let f=s.charCodeAt(0)-97,k=+s[1];if(FLIP){f=7-f;k=9-k}return[f*45+22.5,(8-k)*45+22.5]}\nfunction boardSVG(fen,arrows,last){\n const svg=document.createElementNS(NS,\"svg\");svg.setAttribute(\"viewBox\",\"0 0 360 360\");svg.setAttribute(\"class\",\"bd\");svg.setAttribute(\"role\",\"img\");\n let h=\"\";\n for(let r=0;r<8;r++)for(let f=0;f<8;f++){const light=(r+f)%2===0;h+=`<rect x=\"${f*45}\" y=\"${r*45}\" width=\"45\" height=\"45\" style=\"fill:var(${light?\"--sq-light\":\"--sq-dark\"})\"\/>`}\n if(last){for(const s of[last.slice(0,2),last.slice(2,4)]){const[x,y]=sqXY(s);h+=`<rect x=\"${x-22.5}\" y=\"${y-22.5}\" width=\"45\" height=\"45\" style=\"fill:var(--played)\" opacity=\".28\"\/>`}}\n for(let f=0;f<8;f++)h+=`<text x=\"${f*45+41}\" y=\"356\" font-size=\"8\" text-anchor=\"end\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${\"abcdefgh\"[FLIP?7-f:f]}<\/text>`;\n for(let r=0;r<8;r++)h+=`<text x=\"2\" y=\"${r*45+9}\" font-size=\"8\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${FLIP?r+1:8-r}<\/text>`;\n const rows=fen.split(\"\/\");\n rows.forEach((row,r)=>{let f=0;for(const c of row){if(\/\\d\/.test(c)){f+=+c;continue}h+=`<use href=\"#${D.ids[c]}\" transform=\"translate(${(FLIP?7-f:f)*45},${(FLIP?7-r:r)*45})\"\/>`;f++}});\n (arrows||[]).forEach((a,k)=>{const[x1,y1]=sqXY(a.uci.slice(0,2)),[x2,y2]=sqXY(a.uci.slice(2,4));const dx=x2-x1,dy=y2-y1,L=Math.hypot(dx,dy)||1;const off=a.off||0;const ox=-dy\/L*off,oy=dx\/L*off;const ex=x2-dx\/L*12,ey=y2-dy\/L*12;\n h+=`<line x1=\"${x1+ox}\" y1=\"${y1+oy}\" x2=\"${ex+ox}\" y2=\"${ey+oy}\" style=\"stroke:var(--${a.col===\"pl\"?\"played\":a.col===\"sf\"?\"ink\":a.col})\" stroke-width=\"${a.w||6}\" stroke-linecap=\"round\" ${a.dash?'stroke-dasharray=\"6 6\"':''} opacity=\"${a.op||.85}\" marker-end=\"url(#crl-ah-${a.col})\"\/>`});\n svg.innerHTML=h;return svg}\nfunction arrowsFor(i){\n const p=D.plies[i];const out=[];const seen={};\n (p.props||[]).forEach(([who,san,uci])=>{if(uci===\"-\"||uci===p.uci)return;seen[uci]=(seen[uci]||0)+1;const n=seen[uci]-1;out.push({uci,col:COL[who],off:n*5-2,w:5,op:.8})});\n out.push({uci:p.uci,col:\"pl\",w:7,op:.9});\n if(p.props&&p.bestu&&!p.props.some(x=>x[2]===p.bestu))out.push({uci:p.bestu,col:\"sf\",w:4,op:.9,dash:1});return out}\nfunction propsTable(i){\n const p=D.plies[i];if(!p.props)return\"\";\n let h='<table class=\"props\"><thead><tr><th>Membre<\/th><th>Coup<\/th><th class=\"num\">Machine<\/th><th class=\"num\">Stockfish<\/th><\/tr><\/thead><tbody>';\n p.props.forEach(([who,san,uci,ev,sf])=>{const ch=uci===p.uci;h+=`<tr class=\"${ch?\"chosen\":\"\"}\"><td><span class=\"chip\"><i class=\"dot d-${COL[who]}\"><\/i>${NAME[who]}<\/span><\/td><td>${san}${ch?\" \u2713\":\"\"}<\/td><td class=\"num\" title=\"\u00e9valuation annonc\u00e9e par la machine\">${ev===\"?\"?\"\u2013\":ev.replace(\"-\",\"\u2212\").replace(\".\",\",\")}<\/td><td class=\"num ${sf>0?\"pos\":sf<0?\"neg\":\"\"}\" title=\"Stockfish\">${fmt(sf)}<\/td><\/tr>`});\n h+='<\/tbody><\/table>';if(p.best&&!p.props.some(x=>x[2]===p.bestu))h+=`<div class=\"small\">Coup de Stockfish, propos\u00e9 par personne : <b>${p.best}<\/b> (fl\u00e8che en pointill\u00e9).<\/div>`;return h}\n\/\/ moments\nconst momByPly={};D.moments.forEach(m=>momByPly[m.ply]=m);\nconst mc=document.getElementById(\"crl-moments\");\nD.moments.forEach(m=>{const i=m.ply,p=D.plies[i];const card=document.createElement(\"article\");card.className=\"moment\";\n const bd=document.createElement(\"div\");bd.className=\"bd\";bd.appendChild(boardSVG(fenBefore(i),arrowsFor(i)));\n const tx=document.createElement(\"div\");tx.className=\"txt\";\n tx.innerHTML=`<span class=\"tag\">${moveLabel(i)}${p.san} \u00b7 Stockfish apr\u00e8s le coup ${fmt(p.ev)}<\/span><h3>${m.title}<\/h3><p>${m.text}<\/p>${propsTable(i)}<button type=\"button\" data-go=\"${i}\">Voir dans la partie<\/button>`;\n card.append(bd,tx);mc.appendChild(card)});\nmc.addEventListener(\"click\",e=>{const b=e.target.closest(\"[data-go]\");if(b){go(+b.dataset.go);document.getElementById(\"crl-t-rep\").scrollIntoView({behavior:\"smooth\"})}});\n\/\/ graph\n(function(){const g=document.getElementById(\"crl-graph\");const n=D.plies.length;const W=1000,H=190,L=34,R=8,T=10,B=24;\n const x=i=>L+(W-L-R)*i\/(n-1),y=v=>{v=Math.max(-600,Math.min(600,v));return T+(H-T-B)*(1-(v+600)\/1200)};\n let h=\"\";[-600,-300,0,300,600].forEach(v=>{h+=`<line x1=\"${L}\" x2=\"${W-R}\" y1=\"${y(v)}\" y2=\"${y(v)}\" style=\"stroke:var(--line)\" stroke-width=\"${v===0?1.5:1}\"\/><text x=\"${L-6}\" y=\"${y(v)+3}\" text-anchor=\"end\">${v>0?\"+\":\"\"}${v\/100}<\/text>`});\n for(let m=10;m<=Math.ceil(n\/2);m+=10){const i=2*(m-1);h+=`<text x=\"${x(i)}\" y=\"${H-6}\" text-anchor=\"middle\">${m}<\/text>`}\n const pts=D.plies.map((p,i)=>`${x(i).toFixed(1)},${y(p.ev).toFixed(1)}`);\n h+=`<path d=\"M${x(0)},${y(0)} L${pts.join(\" L\")} L${x(n-1)},${y(0)} Z\" style=\"fill:var(--played)\" opacity=\".14\"\/>`;\n h+=`<polyline points=\"${pts.join(\" \")}\" style=\"fill:none;stroke:var(--played)\" stroke-width=\"2\"\/>`;\n D.moments.forEach(m=>{const i=m.ply;h+=`<circle cx=\"${x(i)}\" cy=\"${y(D.plies[i].ev)}\" r=\"5\" style=\"fill:var(--surface);stroke:var(--ink);cursor:pointer\" stroke-width=\"1.5\" data-go=\"${i}\"><title>${moveLabel(i)}${D.plies[i].san} \u2014 ${m.title}<\/title><\/circle>`});\n g.innerHTML=h;g.addEventListener(\"click\",e=>{const c=e.target.closest(\"[data-go]\");if(c){go(+c.dataset.go)}})})();\n\/\/ move list\nconst ml=document.getElementById(\"crl-movelist\");const btns=[];\nfor(let i=0;i<D.plies.length;i+=2){const no=document.createElement(\"div\");no.className=\"no\";no.textContent=(i\/2+1)+\".\";ml.appendChild(no);\n for(const j of[i,i+1]){if(j>=D.plies.length){ml.appendChild(document.createElement(\"div\"));continue}const p=D.plies[j];const b=document.createElement(\"button\");b.type=\"button\";b.className=\"mv\"+(momByPly[j]?\" key\":\"\");\n let mk=\"\";if(p.mode){mk=`<i class=\"mk\" style=\"background:${p.mode===\"unanime\"?\"var(--line)\":\"var(--played)\"}\" title=\"${p.mode}\"><\/i>`}\n b.innerHTML=`${p.san}${mk}`;b.addEventListener(\"click\",()=>go(j));ml.appendChild(b);btns[j]=b}}\nlet cur=-1;\nfunction go(i){cur=Math.max(-1,Math.min(D.plies.length-1,i));render()}\nfunction render(){const bd=document.getElementById(\"crl-board\");bd.innerHTML=\"\";\n const fen=cur<0?START:D.plies[cur].fen;bd.appendChild(boardSVG(fen,[],cur>=0?D.plies[cur].uci:null));\n btns.forEach(b=>b&&b.classList.remove(\"on\"));if(cur>=0&&btns[cur]){btns[cur].classList.add(\"on\");{const L=document.getElementById(\"crl-movelist\"),B=btns[cur];L.scrollTop+=B.getBoundingClientRect().top-L.getBoundingClientRect().top-L.clientHeight\/2}}\n const c=document.getElementById(\"crl-comment\");document.getElementById(\"crl-cur\").textContent=cur<0?\"position initiale\":`${moveLabel(cur)}${D.plies[cur].san}`;\n if(cur<0){c.innerHTML='<p>Position initiale. Avance avec \u25b6 ou clique un coup.<\/p>';return}\n const p=D.plies[cur],m=momByPly[cur];let h=\"\";\n if(m)h+=`<h3>${m.title}<\/h3><p>${m.text}<\/p>`;\n if(p.book)h+='<p class=\"small\">Coup du livre d\\'ouvertures.<\/p>';\n else if(p.props){h+=`<p class=\"small\">${p.mode===\"unanime\"?\"Les quatre membres sont d'accord : l'arbitre n'est pas consult\u00e9.\":\"Les membres divergent : l'arbitre tranche.\"}<\/p>`+propsTable(cur)}\n else if(p.mode)h+=`<p class=\"small\">${p.mode}<\/p>`;\n else h+=`<p class=\"small\">Coup de Ethereal 11.75.<\/p>`;\n h+=`<p class=\"small\">Stockfish apr\u00e8s le coup : ${fmt(p.ev)}${p.best&&p.best!==p.san?` \u00b7 son coup : ${p.best}`:\"\"}<\/p>`;\n c.innerHTML=h}\ndocument.getElementById(\"crl-b-start\").onclick=()=>go(-1);document.getElementById(\"crl-b-prev\").onclick=()=>go(cur-1);\ndocument.getElementById(\"crl-b-next\").onclick=()=>go(cur+1);document.getElementById(\"crl-b-end\").onclick=()=>go(D.plies.length-1);\ndocument.addEventListener(\"keydown\",e=>{const R=document.getElementById(\"crl-board\").getBoundingClientRect();if(R.bottom<0||R.top>innerHeight)return;if(e.target.closest(\"input,textarea\"))return;if(e.key===\"ArrowRight\"){go(cur+1);e.preventDefault()}if(e.key===\"ArrowLeft\"){go(cur-1);e.preventDefault()}});\ngo(36);\n})();\n<\/script>\n\n<h2><span class=\"lead-num\">8.<\/span>Synth\u00e8se : Orion, Pl\u00e9iades, Crux<\/h2>\n<p>Les trois m\u00e9ta-moteurs du laboratoire suivent la m\u00eame recette : des membres d’auteurs diff\u00e9rents qui r\u00e9fl\u00e9chissent en parall\u00e8le, et Stockfish 18 qui choisit parmi leurs coups sans jamais en proposer.<\/p>\n<table>\n<thead><tr><th>M\u00e9ta-moteur<\/th><th>Membres<\/th><th class=\"num\">Moyenne des membres<\/th><th class=\"num\">Cote Ordo<\/th><th class=\"num\">Gain<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Orion<\/td><td>3 machines d\u00e9di\u00e9es (Forte A, MM IV, Designer 2100)<\/td><td class=\"num\">1788<\/td><td class=\"num\">2316<\/td><td class=\"num\">+528<\/td><\/tr>\n<tr><td>Pl\u00e9iades<\/td><td>7 machines d\u00e9di\u00e9es et programmes DOS<\/td><td class=\"num\">2147<\/td><td class=\"num\">2921<\/td><td class=\"num\">+774<\/td><\/tr>\n<tr><td>Crux<\/td><td>4 moteurs PC (Shredder, Fritz, Junior, Hiarcs)<\/td><td class=\"num\">2917<\/td><td class=\"num\">3395<\/td><td class=\"num\">+478<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>Trois le\u00e7ons ressortent.<\/p>\n<p><strong>Plus de membres, plus de gain.<\/strong> Avec trois membres, Orion gagne 528 points. Avec sept, Pl\u00e9iades en gagne 774. Trois m\u00e9ta-moteurs ne suffisent pas pour en faire une loi, mais c’est logique : plus il y a de propositions, plus l’arbitre a de chances d’y trouver un bon coup.<\/p>\n<p><strong>Le gain r\u00e9siste au niveau.<\/strong> Avec quatre membres d\u00e9j\u00e0 tr\u00e8s forts, Crux gagne encore 478 points sur leur moyenne et 419 sur le meilleur d’entre eux. Pourtant, les erreurs de moteurs \u00e0 2900 sont bien plus rares que celles de machines \u00e0 1800. \u00c0 ce niveau, les adversaires annulent beaucoup, et chaque point de performance co\u00fbte cher.<\/p>\n<p><strong>La limite est la m\u00eame partout.<\/strong> Le m\u00e9ta-moteur corrige les erreurs individuelles, pas les erreurs partag\u00e9es. Sur les 69 gaffes jou\u00e9es par Crux, 55 venaient de positions o\u00f9 tous les membres se trompaient. La diversit\u00e9 des auteurs compte autant que leur force.<\/p>\n<p>La suite est d\u00e9j\u00e0 en route. <strong>Andromeda<\/strong>, huit membres, est en train de jouer son gauntlet. On saura bient\u00f4t si huit t\u00eates font encore mieux que quatre.<\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Shredder 7, Fritz 9, Junior 8 et Hiarcs 8 r\u00e9unis sous l’arbitrage de Stockfish 18 : 3395 Elo, 419 points au-dessus du meilleur membre. Analyse de 12 095 d\u00e9cisions, deux parties \u00e0 rejouer et la synth\u00e8se des trois m\u00e9ta-moteurs.<\/p>\n","protected":false},"author":1,"featured_media":4769,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"categories":[72],"tags":[],"rttpg_featured_image_url":{"full":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"landscape":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"portraits":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"thumbnail":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-150x150.png",150,150,true],"medium":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-300x200.png",300,200,true],"large":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-1024x683.png",1024,683,true],"1536x1536":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"2048x2048":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"neve-blog":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-930x620.png",930,620,true]},"rttpg_author":{"display_name":"valterd","author_link":"https:\/\/www.chess.lumn.eu\/wordpress\/author\/valterd\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/category\/developpements\/\" rel=\"category tag\">D\u00e9veloppements<\/a>","rttpg_excerpt":"Shredder 7, Fritz 9, Junior 8 et Hiarcs 8 r\u00e9unis sous l'arbitrage de Stockfish 18 : 3395 Elo, 419 points au-dessus du meilleur membre. Analyse de 12 095 d\u00e9cisions, deux parties \u00e0 rejouer et la synth\u00e8se des trois m\u00e9ta-moteurs.","_links":{"self":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4770"}],"collection":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/comments?post=4770"}],"version-history":[{"count":1,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4770\/revisions"}],"predecessor-version":[{"id":4771,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4770\/revisions\/4771"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media\/4769"}],"wp:attachment":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media?parent=4770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/categories?post=4770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/tags?post=4770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":4770,"date":"2026-11-07T07:57:25","date_gmt":"2026-11-07T07:57:25","guid":{"rendered":"https:\/\/www.chess.lumn.eu\/wordpress\/?p=4770"},"modified":"2026-11-07T07:57:25","modified_gmt":"2026-11-07T07:57:25","slug":"meta-moteur-crux","status":"publish","type":"post","link":"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/07\/meta-moteur-crux\/","title":{"rendered":"M\u00e9ta-moteur ‘Shahmatic Crux’ : quatre champions valent-ils mieux qu’un ?"},"content":{"rendered":"\n\n\n\n\n\nQuatre champions valent-ils mieux qu’un ?<\/title>\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.gstatic.com\" crossorigin>\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display&family=DM+Sans:ital,opsz,wght@0,9..40,400;0,9..40,500;0,9..40,700;1,9..40,400&family=JetBrains+Mono:wght@400;600&display=swap\" 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5px;}\n}\n<\/style>\n<\/head>\n<body>\n<article class=\"naum-body\">\n<p class=\"eyebrow\">Laboratoire \u00b7 m\u00e9ta-moteur<\/p>\n<h1>Quatre champions valent-ils mieux qu’un ?<\/h1>\n<p class=\"chapeau\">Apr\u00e8s Orion, le trio de machines d\u00e9di\u00e9es, et Pl\u00e9iades, l’assembl\u00e9e de sept, voici Crux : quatre grands moteurs PC du d\u00e9but des ann\u00e9es 2000, Shredder 7, Fritz 9, Junior 8 et Hiarcs 8, et toujours Stockfish 18 en arbitre. Il vient de terminer un gauntlet de 150 parties contre des moteurs modernes. R\u00e9sultat : 3395 Elo, soit pr\u00e8s de 420 points au-dessus de son meilleur membre.<\/p>\n<div class=\"stats\">\n <div class=\"stat\"><b>3395<\/b><span>cote Ordo (\u00b130), 150 parties<\/span><\/div>\n <div class=\"stat\"><b>+478<\/b><span>au-dessus de la moyenne des 4 membres (2917)<\/span><\/div>\n <div class=\"stat\"><b>+419<\/b><span>au-dessus du meilleur membre, Shredder 7 (2976)<\/span><\/div>\n <div class=\"stat\"><b>3434<\/b><span>cote moyenne des 15 adversaires<\/span><\/div>\n<\/div>\n\n<h2><span class=\"lead-num\">1.<\/span>De Pl\u00e9iades \u00e0 Crux<\/h2>\n<p>Orion et Pl\u00e9iades ont montr\u00e9 qu’une assembl\u00e9e de vieilles machines d’\u00e9checs, d\u00e9partag\u00e9e par un arbitre, joue bien plus fort que chacun de ses membres. Mais leurs membres \u00e9taient faibles : 1788 de moyenne pour Orion, 2147 pour Pl\u00e9iades. La marge de progr\u00e8s \u00e9tait grande. La vraie question \u00e9tait de savoir si le principe tient encore quand les membres sont d\u00e9j\u00e0 tr\u00e8s forts, et que leurs erreurs deviennent rares et subtiles.<\/p>\n<p>Crux r\u00e9unit donc quatre moteurs qui ont domin\u00e9 les championnats et les listes de classement au tournant des ann\u00e9es 2000. Ce sont quatre auteurs, et quatre styles diff\u00e9rents :<\/p>\n<table>\n<thead><tr><th>Membre<\/th><th>Auteur<\/th><th class=\"num\">Cote (liste maison)<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Shredder 7<\/td><td>Stefan Meyer-Kahlen<\/td><td class=\"num\">2976<\/td><\/tr>\n<tr><td>Fritz 9<\/td><td>Frans Morsch et Mathias Feist<\/td><td class=\"num\">2970<\/td><\/tr>\n<tr><td>Hiarcs 8<\/td><td>Mark Uniacke<\/td><td class=\"num\">2873<\/td><\/tr>\n<tr><td>Junior 8<\/td><td>Amir Ban et Shay Bushinsky<\/td><td class=\"num\">2849<\/td><\/tr>\n<tr class=\"tot\"><td>Moyenne<\/td><td>quatre auteurs<\/td><td class=\"num\">2917<\/td><\/tr>\n<\/tbody>\n<\/table>\n\n<h2><span class=\"lead-num\">2.<\/span>Comment \u00e7a marche<\/h2>\n<p>Le fonctionnement est le m\u00eame que pour Pl\u00e9iades. \u00c0 chaque coup, les quatre moteurs re\u00e7oivent la position et r\u00e9fl\u00e9chissent <strong>en parall\u00e8le<\/strong>, 15 secondes chacun. Si les quatre proposent le m\u00eame coup, il est jou\u00e9 directement. Sinon, <strong>Stockfish 18<\/strong> re\u00e7oit la liste des coups propos\u00e9s <em>(go searchmoves)<\/em>, r\u00e9fl\u00e9chit environ une seconde et choisit le meilleur. L’arbitre ne compte pas les voix : un coup propos\u00e9 par un seul membre peut l’emporter sur un coup propos\u00e9 par trois. Et il ne propose jamais de coup lui-m\u00eame : il ne choisit que parmi ceux des membres.<\/p>\n<div class=\"callout\">\n<b>Ce que dit le journal de Crux.<\/b> Pour chaque coup, Crux note la proposition de chaque membre, son \u00e9valuation, sa profondeur et son temps, puis le coup retenu. Sur les 150 parties, ce journal contient <b>12 095 d\u00e9cisions<\/b>. Pour mesurer la qualit\u00e9 des propositions, chaque position a ensuite \u00e9t\u00e9 r\u00e9\u00e9valu\u00e9e par Stockfish 17.1, coup propos\u00e9 par coup propos\u00e9. Ces mesures servent \u00e0 la section 5 et aux deux parties comment\u00e9es.\n<\/div>\n\n<h2><span class=\"lead-num\">3.<\/span>Les chiffres : deux gauntlets<\/h2>\n<p>Crux a d’abord jou\u00e9 un gauntlet de contr\u00f4le contre ses propres membres : <strong>93 points sur 100<\/strong>, soit une performance de 3372. Le m\u00e9ta-moteur \u00e9crase chacune de ses quatre t\u00eates jou\u00e9es seules. Il a ensuite affront\u00e9 une \u00e9chelle de quinze moteurs modernes, de 3310 \u00e0 3596, \u00e0 raison de dix parties contre chacun, avec les Blancs et avec les Noirs.<\/p>\n<table>\n<thead><tr><th>Adversaire<\/th><th class=\"num\">Score \/10<\/th><th class=\"num\">Performance<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Naum 4.2<\/td><td class=\"num\">7<\/td><td class=\"num\">3464<\/td><\/tr>\n<tr><td>SF 11 ARM9<\/td><td class=\"num\">6,5<\/td><td class=\"num\">3438<\/td><\/tr>\n<tr><td>Komodo64 3<\/td><td class=\"num\">6<\/td><td class=\"num\">3380<\/td><\/tr>\n<tr><td>Wasp 2.00<\/td><td class=\"num\">6<\/td><td class=\"num\">3386<\/td><\/tr>\n<tr><td>Strelka 5.5<\/td><td class=\"num\">6<\/td><td class=\"num\">3480<\/td><\/tr>\n<tr><td>Critter<\/td><td class=\"num\">5,5<\/td><td class=\"num\">3445<\/td><\/tr>\n<tr><td>Wasp 3.75<\/td><td class=\"num\">5<\/td><td class=\"num\">3403<\/td><\/tr>\n<tr><td>Senpai 2.0<\/td><td class=\"num\">4,5<\/td><td class=\"num\">3289<\/td><\/tr>\n<tr><td>Rebel-Extreme 1.1<\/td><td class=\"num\">4<\/td><td class=\"num\">3515<\/td><\/tr>\n<tr><td>Deep Rybka 4.1<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3319<\/td><\/tr>\n<tr><td>Gull 3<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3358<\/td><\/tr>\n<tr><td>Houdini 4<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3375<\/td><\/tr>\n<tr><td>Deep Shredder 13<\/td><td class=\"num\">3,5<\/td><td class=\"num\">3425<\/td><\/tr>\n<tr><td>Wasp 5.50<\/td><td class=\"num\">1,5<\/td><td class=\"num\">3293<\/td><\/tr>\n<tr><td>Ethereal 11.75<\/td><td class=\"num\">1,5<\/td><td class=\"num\">3295<\/td><\/tr>\n<tr class=\"tot\"><td>Total<\/td><td class=\"num\">67,5 \/150<\/td><td class=\"num\">3395<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>Le bilan est de <strong>18 victoires, 99 nulles et 33 d\u00e9faites<\/strong>. Deux parties sur trois sont nulles : \u00e0 ce niveau, Crux d\u00e9fend tr\u00e8s bien, mais il gagne peu. Il est nettement plus \u00e0 l’aise avec les Blancs (36 sur 75, 10 victoires pour 13 d\u00e9faites) qu’avec les Noirs (31,5 sur 75, 8 victoires pour 20 d\u00e9faites). Les parties sont longues : 90 coups et 43 minutes en moyenne, soit plus de 106 heures de jeu au total. Les deux ouvertures les plus jou\u00e9es sont l’Espagnole (28 parties) et la Sicilienne (26).<\/p>\n<p>Ordo, qui p\u00e8se toutes les parties du laboratoire ensemble, donne <strong>3395<\/strong> : le niveau des moteurs modernes de l’\u00e9chelle, avec des membres qui ont une vingtaine d’ann\u00e9es de plus.<\/p>\n\n<h2><span class=\"lead-num\">4.<\/span>Comment Crux d\u00e9cide<\/h2>\n<p>Sur les 12 095 coups jou\u00e9s par Crux hors du livre d’ouvertures, les quatre membres \u00e9taient d’accord 3964 fois (<strong>33 %<\/strong>). Dans les deux tiers des cas, il a donc fallu trancher. Le plus souvent, il y avait deux candidats (4385 fois), puis trois (2837 fois). Les quatre membres ont propos\u00e9 quatre coups diff\u00e9rents 909 fois.<\/p>\n<table>\n<thead><tr><th>Membre<\/th><th class=\"num\">Coup retenu propos\u00e9<\/th><th class=\"num\">Seul \u00e0 le proposer<\/th><th class=\"num\">Isol\u00e9<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Shredder 7<\/td><td class=\"num\">7787 (64,4 %)<\/td><td class=\"num\">975<\/td><td class=\"num\">2986<\/td><\/tr>\n<tr><td>Fritz 9<\/td><td class=\"num\">7659 (63,3 %)<\/td><td class=\"num\">953<\/td><td class=\"num\">3188<\/td><\/tr>\n<tr><td>Hiarcs 8<\/td><td class=\"num\">7561 (62,5 %)<\/td><td class=\"num\">871<\/td><td class=\"num\">2993<\/td><\/tr>\n<tr><td>Junior 8<\/td><td class=\"num\">7439 (61,5 %)<\/td><td class=\"num\">931<\/td><td class=\"num\">3366<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p class=\"small\">\u00ab Isol\u00e9 \u00bb : le membre propose un coup que personne d’autre ne propose. \u00ab Seul \u00e0 le proposer \u00bb : ce coup isol\u00e9 est retenu par l’arbitre.<\/p>\n<p>Les quatre membres p\u00e8sent presque autant les uns que les autres. Shredder est un peu plus souvent suivi, Junior un peu moins. Junior est aussi le membre le plus souvent isol\u00e9 (3366 fois) : c’est le plus original des quatre. Mais quand il est seul, il est retenu moins souvent que Shredder ou Fritz.<\/p>\n<p>Deux chiffres montrent que l’arbitre n’est pas un simple vote :<\/p>\n<div class=\"callout\">\n<b>La majorit\u00e9 est renvers\u00e9e presque une fois sur deux.<\/b> Dans les 6060 positions o\u00f9 un coup avait une majorit\u00e9 nette (3 contre 1, ou 2 contre 1 contre 1), l’arbitre a pr\u00e9f\u00e9r\u00e9 un coup minoritaire <b>2821 fois (46,5 %)<\/b>. Il y a eu en plus 1162 partages 2 contre 2, o\u00f9 un vote n’aurait pas pu trancher.<br>\n<b>Les paires qui s’entendent.<\/b> Shredder et Hiarcs sont la paire la plus souvent d’accord (6706 fois), Shredder et Junior la moins souvent (6274). Les deux \u00ab classiques \u00bb, Shredder et Hiarcs, pensent de fa\u00e7on proche. Junior, le moteur isra\u00e9lien r\u00e9put\u00e9 pour ses sacrifices, est celui qui apporte le plus de diversit\u00e9.\n<\/div>\n\n<h2><span class=\"lead-num\">5.<\/span>La pertinence de chaque membre<\/h2>\n<p>Le journal dit qui a \u00e9t\u00e9 suivi, pas qui avait raison. Pour le savoir, Stockfish 17.1 a r\u00e9\u00e9valu\u00e9 <strong>11 541<\/strong> positions de Crux et chaque coup propos\u00e9 dans chacune d’elles. Pour chaque proposition, on mesure la <em>perte<\/em> : l’\u00e9cart entre le meilleur coup de la position et le coup propos\u00e9, en centi\u00e8mes de pion (born\u00e9e \u00e0 3 pions pour qu’une seule gaffe ne fausse pas la moyenne).<\/p>\n<table>\n<thead><tr><th>Membre<\/th><th class=\"num\">Perte moyenne (cp)<\/th><th class=\"num\">Meilleure proposition<\/th><th class=\"num\">Gaffes propos\u00e9es (\u22651,5)<\/th><th class=\"num\">Gaffes jou\u00e9es<\/th><th class=\"num\">Coups d\u00e9cisifs seul<\/th><th class=\"num\">Erreur d’\u00e9valuation (cp)<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Shredder 7<\/td><td class=\"num\">11,7<\/td><td class=\"num\">83,1 %<\/td><td class=\"num\">138<\/td><td class=\"num\">44<\/td><td class=\"num\">30<\/td><td class=\"num\">63<\/td><\/tr>\n<tr><td>Fritz 9<\/td><td class=\"num\">11,2<\/td><td class=\"num\">83,6 %<\/td><td class=\"num\">123<\/td><td class=\"num\">42<\/td><td class=\"num\">59<\/td><td class=\"num\">42<\/td><\/tr>\n<tr><td>Junior 8<\/td><td class=\"num\">12,3<\/td><td class=\"num\">82,7 %<\/td><td class=\"num\">152<\/td><td class=\"num\">45<\/td><td class=\"num\">54<\/td><td class=\"num\">49<\/td><\/tr>\n<tr><td>Hiarcs 8<\/td><td class=\"num\">12,0<\/td><td class=\"num\">82,4 %<\/td><td class=\"num\">128<\/td><td class=\"num\">34<\/td><td class=\"num\">33<\/td><td class=\"num\">\u2013<\/td><\/tr>\n<tr class=\"tot\"><td>Crux (coup jou\u00e9)<\/td><td class=\"num\">7,0<\/td><td class=\"num\">\u2013<\/td><td class=\"num\">\u2013<\/td><td class=\"num\">69<\/td><td class=\"num\">\u2013<\/td><td class=\"num\">\u2013<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p class=\"small\">\u00ab Meilleure proposition \u00bb : le coup du membre est, \u00e0 5 centi\u00e8mes pr\u00e8s, le meilleur des coups propos\u00e9s. \u00ab Gaffes jou\u00e9es \u00bb : les gaffes du membre que Crux a effectivement jou\u00e9es. \u00ab Coups d\u00e9cisifs seul \u00bb : le membre est le seul \u00e0 proposer le coup retenu, et ce coup vaut au moins un demi-pion de plus que toutes les autres propositions. \u00ab Erreur d’\u00e9valuation \u00bb : l’\u00e9cart moyen entre l’\u00e9valuation annonc\u00e9e par le membre et celle de Stockfish, hors positions d\u00e9cid\u00e9es. Hiarcs 8 n’annonce pas son \u00e9valuation dans ce montage. Stockfish a analys\u00e9 environ 0,1 seconde par position : ces chiffres sont des ordres de grandeur.<\/p>\n<p>Le chiffre le plus important est en bas du tableau. Crux perd en moyenne <strong>7,0 centi\u00e8mes<\/strong> par coup. Son meilleur membre en perd 11,2. L’assembl\u00e9e fait donc environ <strong>38 % d’erreur en moins<\/strong> que le meilleur de ses membres. Les membres ont propos\u00e9 entre 123 et 152 gaffes chacun. Crux n’en a jou\u00e9 que 69. Dans 55 de ces cas, toutes les propositions \u00e9taient mauvaises : l’arbitre n’avait aucun bon coup \u00e0 choisir.<\/p>\n<p>Et si on avait simplement fait voter les quatre membres, sans arbitre ? On peut le simuler : le coup le plus propos\u00e9 est jou\u00e9, et en cas d’\u00e9galit\u00e9, celui du membre le mieux cot\u00e9. Ce Crux \u00ab d\u00e9mocratique \u00bb aurait perdu <strong>10,7 centi\u00e8mes<\/strong> par coup, presque autant qu’un membre seul, et jou\u00e9 112 gaffes au lieu de 69. Le vote moyenne les opinions, mais il ne trie pas les bonnes des mauvaises. C’est l’arbitre qui fait le gain.<\/p>\n<table>\n<thead><tr><th>Phase de jeu<\/th><th class=\"num\">Shredder<\/th><th class=\"num\">Fritz<\/th><th class=\"num\">Junior<\/th><th class=\"num\">Hiarcs<\/th><th class=\"num\">Crux<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Sortie du livre (avant le 20<sup>e<\/sup> coup)<\/td><td class=\"num\">15,0<\/td><td class=\"num\">13,5<\/td><td class=\"num\">15,3<\/td><td class=\"num\">15,1<\/td><td class=\"num\"><b>7,0<\/b><\/td><\/tr>\n<tr><td>Milieu de partie (coups 20 \u00e0 45)<\/td><td class=\"num\">14,9<\/td><td class=\"num\">13,9<\/td><td class=\"num\">14,7<\/td><td class=\"num\">15,8<\/td><td class=\"num\"><b>7,8<\/b><\/td><\/tr>\n<tr><td>Fin de partie (apr\u00e8s le 45<sup>e<\/sup> coup)<\/td><td class=\"num\">9,0<\/td><td class=\"num\">9,0<\/td><td class=\"num\">10,1<\/td><td class=\"num\">9,0<\/td><td class=\"num\"><b>6,5<\/b><\/td><\/tr>\n<\/tbody>\n<\/table>\n<p class=\"small\">Perte moyenne en centi\u00e8mes de pion, par phase de jeu. C’est en ouverture et au milieu de partie que l’arbitre apporte le plus : il y divise l’erreur par deux.<\/p>\n\n<h3>Portraits<\/h3>\n<p><strong>Fritz 9 est le membre le plus utile.<\/strong> C’est lui qui perd le moins par coup (11,2), qui propose le plus souvent le meilleur coup (83,6 %), qui a le plus de coups d\u00e9cisifs en solitaire (59) et qui s’\u00e9value avec le plus de justesse (erreur moyenne de 42 centi\u00e8mes). Dans la d\u00e9faite contre Ethereal, c’est aussi lui qui voit en premier que la partie est perdue.<\/p>\n<p><strong>Shredder 7 est le plus suivi.<\/strong> C’est le mieux cot\u00e9 des quatre et l’arbitre retient son coup plus souvent que celui des autres. Mais ses propositions ne sont pas meilleures que celles de Fritz (11,7 centi\u00e8mes perdus par coup), et ses \u00e9valuations sont celles qui s’\u00e9cartent le plus de Stockfish : 63 centi\u00e8mes d’\u00e9cart en moyenne, la plus forte erreur des trois membres mesur\u00e9s. Dans la victoire contre Naum, plus bas, c’est pourtant lui qui trouve seul le coup qui conclut.<\/p>\n<p><strong>Junior 8 est l’original.<\/strong> Il est le plus souvent isol\u00e9 et propose le plus de gaffes (152), mais il apporte aussi beaucoup d’id\u00e9es que personne d’autre ne voit : 54 coups d\u00e9cisifs en solitaire, presque autant que Fritz. Le 16\u2026b5 ! contre Naum, plus bas, est de lui. Sans arbitre, Junior serait un membre dangereux. Avec un arbitre, ses id\u00e9es deviennent un atout.<\/p>\n<p><strong>Hiarcs 8 est le plus prudent.<\/strong> Il est souvent d’accord avec Shredder, et ses gaffes sont celles qui passent le moins souvent : 34 jou\u00e9es sur 128 propos\u00e9es. Il compte 33 coups d\u00e9cisifs en solitaire. C’est le membre le plus discret. Il renforce surtout les bonnes majorit\u00e9s.<\/p>\n<p>Aucun membre n’est inutile. Chacun apporte des coups d\u00e9cisifs que les trois autres n’ont pas vus. C’est la condition pour qu’un m\u00e9ta-moteur fonctionne : des membres dont les erreurs ne se recoupent pas.<\/p>\n\n<h2><span class=\"lead-num\">6.<\/span>La partie la plus spectaculaire : Naum 4.2 \u2013 Crux, 0-1<\/h2>\n<p>Parmi les 18 victoires, celle-ci est la plus belle. Naum 4.2, avec les Blancs, roque du c\u00f4t\u00e9 de la Dame et lance ses pions sur le roi noir. Crux r\u00e9pond par une attaque de pions sur l’autre aile, plus rapide, et mate en 48 coups. Chaque membre y joue un r\u00f4le : l’id\u00e9e de Junior lance l’attaque, Fritz place les pi\u00e8ces, et Shredder trouve la conclusion. Un autre candidat \u00e9tait la victoire contre Rebel-Extreme 1.1, cot\u00e9 3585, mais elle s’est jou\u00e9e dans une longue finale termin\u00e9e par un mat au 116<sup>e<\/sup> coup : plus technique, moins spectaculaire.<\/p>\n<p class=\"small\">\u00c9chiquier vu du c\u00f4t\u00e9 de Crux (les Noirs). 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cy=\"12\" r=\"2.75\"><\/circle><circle cx=\"14\" cy=\"9\" r=\"2.75\"><\/circle><circle cx=\"22.5\" cy=\"8\" r=\"2.75\"><\/circle><circle cx=\"31\" cy=\"9\" r=\"2.75\"><\/circle><circle cx=\"39\" cy=\"12\" r=\"2.75\"><\/circle><\/g><path d=\"M9 26c8.5-1.5 21-1.5 27 0l2.5-12.5L31 25l-.3-14.1-5.2 13.6-3-14.5-3 14.5-5.2-13.6L14 25 6.5 13.5 9 26zM9 26c0 2 1.5 2 2.5 4 1 1.5 1 1 .5 3.5-1.5 1-1.5 2.5-1.5 2.5-1.5 1.5.5 2.5.5 2.5 6.5 1 16.5 1 23 0 0 0 1.5-1 0-2.5 0 0 .5-1.5-1-2.5-.5-2.5-.5-2 .5-3.5 1-2 2.5-2 2.5-4-8.5-1.5-18.5-1.5-27 0z\" stroke-linecap=\"butt\"><\/path><path d=\"M11 38.5a35 35 1 0 0 23 0\" fill=\"none\" stroke-linecap=\"butt\"><\/path><path d=\"M11 29a35 35 1 0 1 23 0M12.5 31.5h20M11.5 34.5a35 35 1 0 0 22 0M10.5 37.5a35 35 1 0 0 24 0\" fill=\"none\" stroke=\"#fff\"><\/path><\/g><g id=\"crw-black-king\" class=\"black king\" fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22.5 11.63V6\" stroke-linejoin=\"miter\"><\/path><path d=\"M22.5 25s4.5-7.5 3-10.5c0 0-1-2.5-3-2.5s-3 2.5-3 2.5c-1.5 3 3 10.5 3 10.5\" fill=\"#000\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\"><\/path><path d=\"M11.5 37c5.5 3.5 15.5 3.5 21 0v-7s9-4.5 6-10.5c-4-6.5-13.5-3.5-16 4V27v-3.5c-3.5-7.5-13-10.5-16-4-3 6 5 10 5 10V37z\" fill=\"#000\"><\/path><path d=\"M20 8h5\" stroke-linejoin=\"miter\"><\/path><path d=\"M32 29.5s8.5-4 6.03-9.65C34.15 14 25 18 22.5 24.5l.01 2.1-.01-2.1C20 18 9.906 14 6.997 19.85c-2.497 5.65 4.853 9 4.853 9M11.5 30c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0\" stroke=\"#fff\"><\/path><\/g>\n<marker id=\"crw-ah-fa\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--fa)\"><\/path><\/marker><marker id=\"crw-ah-mm\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--mm)\"><\/path><\/marker><marker id=\"crw-ah-ds\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ds)\"><\/path><\/marker><marker id=\"crw-ah-hi\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--hi)\"><\/path><\/marker><marker id=\"crw-ah-sf\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ink)\"><\/path><\/marker><marker id=\"crw-ah-pl\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--played)\"><\/path><\/marker>\n<\/defs><\/svg>\n<div class=\"wrap\">\n<div class=\"legend\"><span class=\"chip\"><i class=\"dot d-mm\"><\/i>Shredder 7<\/span><span class=\"chip\"><i class=\"dot d-fa\"><\/i>Fritz 9<\/span><span class=\"chip\"><i class=\"dot d-ds\"><\/i>Junior 8<\/span><span class=\"chip\"><i class=\"dot d-hi\"><\/i>Hiarcs 8<\/span><span class=\"chip\"><i class=\"dot d-pl\"><\/i>coup jou\u00e9<\/span><\/div>\n<div class=\"stats\" aria-label=\"Chiffres de la partie\">\n <div class=\"stat\"><span class=\"n\">39<\/span><span class=\"l\">coups de Crux apr\u00e8s le livre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">17 \/ 22<\/span><span class=\"l\">unanimes \/ tranch\u00e9s par l’arbitre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">5 \u00b7 3 \u00b7 1<\/span><span class=\"l\">coups retenus venus d’un seul membre : Fritz, Shredder, Junior<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">8<\/span><span class=\"l\">propositions \u00e9cart\u00e9es qui co\u00fbtaient plus d’un pion<\/span><\/div>\n<\/div>\n\n<section aria-labelledby=\"crw-t-graph\">\n <h2 id=\"crw-t-graph\">L’\u00e9valuation au fil de la partie<\/h2>\n <div class=\"graph\"><svg id=\"crw-graph\" viewBox=\"0 0 1000 190\" role=\"img\" aria-label=\"\u00c9valuation Stockfish du point de vue de Crux, coup par coup\"><\/svg><\/div>\n <p class=\"small\">\u00c9valuation Stockfish 17.1, du point de vue de Crux, born\u00e9e \u00e0 \u00b16 pions. Les points marquent les moments comment\u00e9s ; un clic place la partie \u00e0 ce coup.<\/p>\n<\/section>\n<section aria-labelledby=\"crw-t-mom\">\n <h2 id=\"crw-t-mom\">Les moments cl\u00e9s<\/h2>\n <p class=\"small\">Chaque diagramme montre la position avant le coup. Fl\u00e8ches : la proposition de chaque membre dans sa couleur, le coup jou\u00e9 en vert, et en pointill\u00e9 le coup de Stockfish quand aucun membre ne l’a propos\u00e9.<\/p>\n <div class=\"moments\" id=\"crw-moments\"><\/div>\n<\/section>\n<section aria-labelledby=\"crw-t-rep\">\n <h2 id=\"crw-t-rep\">Rejouer la partie<\/h2>\n <div class=\"replay\">\n <div class=\"board-col\">\n <div id=\"crw-board\"><\/div>\n <div class=\"controls\">\n <button id=\"crw-b-start\" type=\"button\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n <button id=\"crw-b-prev\" type=\"button\" aria-label=\"Coup pr\u00e9c\u00e9dent\">\u25c0<\/button>\n <button id=\"crw-b-next\" type=\"button\" aria-label=\"Coup suivant\">\u25b6<\/button>\n <button id=\"crw-b-end\" type=\"button\" aria-label=\"Fin\">\u23ed<\/button>\n <span class=\"cur\" id=\"crw-cur\"><\/span>\n <\/div>\n <div class=\"comment\" id=\"crw-comment\" aria-live=\"polite\"><\/div>\n <\/div>\n <div class=\"movelist\" id=\"crw-movelist\"><\/div>\n <\/div>\n <p class=\"small\">Fl\u00e8ches \u2190 \u2192 du clavier pour avancer et reculer.<\/p>\n<\/section>\n<footer><p>Sources : PGN du gauntlet (cutechess) et journal de Crux, qui note pour chaque coup la proposition et l’\u00e9valuation annonc\u00e9e par chaque membre (Hiarcs 8 n’annonce pas la sienne). \u00c9valuations de contr\u00f4le : Stockfish 17.1, environ 0,1 seconde par position, indicatives. Shredder donne ses mats sous forme d’un grand nombre, affich\u00e9 ici \u00ab mat \u00bb.<\/p><p>Cadences : Crux 60\/1800 (15 s par membre et environ 1 s d’arbitre par coup), adversaire 60\/900.<\/p><\/footer>\n<\/div>\n<\/div>\n<script>\n(function(){\nconst 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Les quatre membres de Crux r\u00e9pondent pareil : 12\u2026g5, qui bloque l'aile roi. L'arbitre n'est pas consult\u00e9. Stockfish trouve aussi ce coup.\"},{\"ply\":31,\"tag\":\"\",\"title\":\"16\u2026b5 ! L'id\u00e9e de Junior seul\",\"text\":\"Naum a roqu\u00e9 du c\u00f4t\u00e9 de la Dame et pouss\u00e9 g4. Shredder et Hiarcs voulaient ouvrir le centre (cxd4, +0,94), Fritz jouer Tb8 (+0,99). Junior, seul, propose de lancer le pion b sur le roque adverse : Stockfish l'\u00e9value \u00e0 +1,39 et l'arbitre le retient. C'est le coup qui donne son sens \u00e0 la partie : c'est d\u00e9sormais une course entre deux attaques de pions, et c'est Crux qui va le plus vite.\"},{\"ply\":35,\"tag\":\"\",\"title\":\"18\u2026Tb8, Fritz contre tous\",\"text\":\"Quatre membres, quatre coups diff\u00e9rents. Shredder voulait b4 (+0,82), Hiarcs Rg8 (+1,26), Junior Fb7 (+1,50). Fritz propose Tb8, qui met la tour sur la colonne qui va s'ouvrir : +1,73. L'arbitre le suit. Dans cette partie, Fritz est le membre dont le coup a \u00e9t\u00e9 retenu seul le plus souvent, 5 fois.\"},{\"ply\":39,\"tag\":\"\",\"title\":\"20\u2026Cb6, encore Fritz\",\"text\":\"Shredder et Hiarcs voulaient prendre en f3 (+1,26), Junior jouer a6 (+1,32). Fritz, seul, ram\u00e8ne le cavalier vers d5 : +1,88. Une majorit\u00e9 de deux voix est \u00e9cart\u00e9e par l'arbitre. Dans le gauntlet, cela arrive presque une fois sur deux.\"},{\"ply\":45,\"tag\":\"\",\"title\":\"23\u2026Fe4+ : trois contre un\",\"text\":\"Le cavalier a \u00e9t\u00e9 \u00e9chang\u00e9 en c3, la diagonale h1-a8 est \u00e0 Crux. Shredder voulait se replier en g2 (+1,90). Les trois autres donnent l'\u00e9chec en e4 (+2,57), qui chasse le roi blanc en a1. Ici, la majorit\u00e9 a raison et l'arbitre la suit.\"},{\"ply\":69,\"tag\":\"\",\"title\":\"35\u2026fxe5 : deux contre deux\",\"text\":\"Partage parfait. Junior et Hiarcs veulent prendre en g5 (hxg5, +2,09 seulement). Shredder et Fritz pr\u00e9f\u00e8rent fxe5 (+4,23). L'arbitre ne compte pas les voix : il fait chercher Stockfish une seconde parmi les coups propos\u00e9s, et il prend celui qui vaut deux pions de plus.\"},{\"ply\":77,\"tag\":\"\",\"title\":\"39\u2026Ta8 ! Shredder voit le mat\",\"text\":\"Fritz voulait Tb4 (+4,92), Junior Db4 (+5,43), Hiarcs Da7 (+5,59). Shredder, seul, propose Ta8 et l'annonce \u00e0 +11,08 : il a vu que la tour, pass\u00e9e sur la colonne a, va achever le roi blanc. Stockfish confirme (+7,28) et l'arbitre retient le coup. Deux coups plus tard, les membres annoncent un mat.\"},{\"ply\":95,\"tag\":\"\",\"title\":\"48\u2026Fxd4#\",\"text\":\"Le roi blanc est traqu\u00e9 jusqu'en c3 et le fou donne le mat. Naum 4.2, contre qui Crux marque 7 sur 10, est battu en 48 coups avec les Noirs. C'est une attaque de pions men\u00e9e sur le roque adverse, et chacun des quatre membres a donn\u00e9 au moins un coup d\u00e9cisif.\"}],\"ids\":{\"P\":\"crw-white-pawn\",\"N\":\"crw-white-knight\",\"B\":\"crw-white-bishop\",\"R\":\"crw-white-rook\",\"Q\":\"crw-white-queen\",\"K\":\"crw-white-king\",\"p\":\"crw-black-pawn\",\"n\":\"crw-black-knight\",\"b\":\"crw-black-bishop\",\"r\":\"crw-black-rook\",\"q\":\"crw-black-queen\",\"k\":\"crw-black-king\"}};\nconst NS=\"http:\/\/www.w3.org\/2000\/svg\";\nconst COL={SH:\"mm\",FR:\"fa\",JU:\"ds\",HI:\"hi\"};const FLIP=true;\nconst NAME={SH:\"Shredder 7\",FR:\"Fritz 9\",JU:\"Junior 8\",HI:\"Hiarcs 8\"};\nconst START=\"rnbqkbnr\/pppppppp\/8\/8\/8\/8\/PPPPPPPP\/RNBQKBNR\";\nconst fenBefore=i=>i<=0?START:D.plies[i-1].fen;\nfunction moveLabel(i){const n=Math.floor(i\/2)+1;return i%2===0?n+\".\":n+\"\u2026\"}\nfunction fmt(v){if(v===null||v===undefined)return\"\u2013\";if(Math.abs(v)>=9000)return v>0?\"mat\":\"\u2212mat\";const s=(v\/100).toFixed(2).replace(\".\",\",\");return(v>0?\"+\":v<0?\"\u2212\":\"\")+s.replace(\"-\",\"\")}\nfunction sqXY(s){let f=s.charCodeAt(0)-97,k=+s[1];if(FLIP){f=7-f;k=9-k}return[f*45+22.5,(8-k)*45+22.5]}\nfunction boardSVG(fen,arrows,last){\n const svg=document.createElementNS(NS,\"svg\");svg.setAttribute(\"viewBox\",\"0 0 360 360\");svg.setAttribute(\"class\",\"bd\");svg.setAttribute(\"role\",\"img\");\n let h=\"\";\n for(let r=0;r<8;r++)for(let f=0;f<8;f++){const light=(r+f)%2===0;h+=`<rect x=\"${f*45}\" y=\"${r*45}\" width=\"45\" height=\"45\" style=\"fill:var(${light?\"--sq-light\":\"--sq-dark\"})\"\/>`}\n if(last){for(const s of[last.slice(0,2),last.slice(2,4)]){const[x,y]=sqXY(s);h+=`<rect x=\"${x-22.5}\" y=\"${y-22.5}\" width=\"45\" height=\"45\" style=\"fill:var(--played)\" opacity=\".28\"\/>`}}\n for(let f=0;f<8;f++)h+=`<text x=\"${f*45+41}\" y=\"356\" font-size=\"8\" text-anchor=\"end\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${\"abcdefgh\"[FLIP?7-f:f]}<\/text>`;\n for(let r=0;r<8;r++)h+=`<text x=\"2\" y=\"${r*45+9}\" font-size=\"8\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${FLIP?r+1:8-r}<\/text>`;\n const rows=fen.split(\"\/\");\n rows.forEach((row,r)=>{let f=0;for(const c of row){if(\/\\d\/.test(c)){f+=+c;continue}h+=`<use href=\"#${D.ids[c]}\" transform=\"translate(${(FLIP?7-f:f)*45},${(FLIP?7-r:r)*45})\"\/>`;f++}});\n (arrows||[]).forEach((a,k)=>{const[x1,y1]=sqXY(a.uci.slice(0,2)),[x2,y2]=sqXY(a.uci.slice(2,4));const dx=x2-x1,dy=y2-y1,L=Math.hypot(dx,dy)||1;const off=a.off||0;const ox=-dy\/L*off,oy=dx\/L*off;const ex=x2-dx\/L*12,ey=y2-dy\/L*12;\n h+=`<line x1=\"${x1+ox}\" y1=\"${y1+oy}\" x2=\"${ex+ox}\" y2=\"${ey+oy}\" style=\"stroke:var(--${a.col===\"pl\"?\"played\":a.col===\"sf\"?\"ink\":a.col})\" stroke-width=\"${a.w||6}\" stroke-linecap=\"round\" ${a.dash?'stroke-dasharray=\"6 6\"':''} opacity=\"${a.op||.85}\" marker-end=\"url(#crw-ah-${a.col})\"\/>`});\n svg.innerHTML=h;return svg}\nfunction arrowsFor(i){\n const p=D.plies[i];const out=[];const seen={};\n (p.props||[]).forEach(([who,san,uci])=>{if(uci===\"-\"||uci===p.uci)return;seen[uci]=(seen[uci]||0)+1;const n=seen[uci]-1;out.push({uci,col:COL[who],off:n*5-2,w:5,op:.8})});\n out.push({uci:p.uci,col:\"pl\",w:7,op:.9});\n if(p.props&&p.bestu&&!p.props.some(x=>x[2]===p.bestu))out.push({uci:p.bestu,col:\"sf\",w:4,op:.9,dash:1});return out}\nfunction propsTable(i){\n const p=D.plies[i];if(!p.props)return\"\";\n let h='<table class=\"props\"><thead><tr><th>Membre<\/th><th>Coup<\/th><th class=\"num\">Machine<\/th><th class=\"num\">Stockfish<\/th><\/tr><\/thead><tbody>';\n p.props.forEach(([who,san,uci,ev,sf])=>{const ch=uci===p.uci;h+=`<tr class=\"${ch?\"chosen\":\"\"}\"><td><span class=\"chip\"><i class=\"dot d-${COL[who]}\"><\/i>${NAME[who]}<\/span><\/td><td>${san}${ch?\" \u2713\":\"\"}<\/td><td class=\"num\" title=\"\u00e9valuation annonc\u00e9e par la machine\">${ev===\"?\"?\"\u2013\":ev.replace(\"-\",\"\u2212\").replace(\".\",\",\")}<\/td><td class=\"num ${sf>0?\"pos\":sf<0?\"neg\":\"\"}\" title=\"Stockfish\">${fmt(sf)}<\/td><\/tr>`});\n h+='<\/tbody><\/table>';if(p.best&&!p.props.some(x=>x[2]===p.bestu))h+=`<div class=\"small\">Coup de Stockfish, propos\u00e9 par personne : <b>${p.best}<\/b> (fl\u00e8che en pointill\u00e9).<\/div>`;return h}\n\/\/ moments\nconst momByPly={};D.moments.forEach(m=>momByPly[m.ply]=m);\nconst mc=document.getElementById(\"crw-moments\");\nD.moments.forEach(m=>{const i=m.ply,p=D.plies[i];const card=document.createElement(\"article\");card.className=\"moment\";\n const bd=document.createElement(\"div\");bd.className=\"bd\";bd.appendChild(boardSVG(fenBefore(i),arrowsFor(i)));\n const tx=document.createElement(\"div\");tx.className=\"txt\";\n tx.innerHTML=`<span class=\"tag\">${moveLabel(i)}${p.san} \u00b7 Stockfish apr\u00e8s le coup ${fmt(p.ev)}<\/span><h3>${m.title}<\/h3><p>${m.text}<\/p>${propsTable(i)}<button type=\"button\" data-go=\"${i}\">Voir dans la partie<\/button>`;\n card.append(bd,tx);mc.appendChild(card)});\nmc.addEventListener(\"click\",e=>{const b=e.target.closest(\"[data-go]\");if(b){go(+b.dataset.go);document.getElementById(\"crw-t-rep\").scrollIntoView({behavior:\"smooth\"})}});\n\/\/ graph\n(function(){const g=document.getElementById(\"crw-graph\");const n=D.plies.length;const W=1000,H=190,L=34,R=8,T=10,B=24;\n const x=i=>L+(W-L-R)*i\/(n-1),y=v=>{v=Math.max(-600,Math.min(600,v));return T+(H-T-B)*(1-(v+600)\/1200)};\n let h=\"\";[-600,-300,0,300,600].forEach(v=>{h+=`<line x1=\"${L}\" x2=\"${W-R}\" y1=\"${y(v)}\" y2=\"${y(v)}\" style=\"stroke:var(--line)\" stroke-width=\"${v===0?1.5:1}\"\/><text x=\"${L-6}\" y=\"${y(v)+3}\" text-anchor=\"end\">${v>0?\"+\":\"\"}${v\/100}<\/text>`});\n for(let m=10;m<=Math.ceil(n\/2);m+=10){const i=2*(m-1);h+=`<text x=\"${x(i)}\" y=\"${H-6}\" text-anchor=\"middle\">${m}<\/text>`}\n const pts=D.plies.map((p,i)=>`${x(i).toFixed(1)},${y(p.ev).toFixed(1)}`);\n h+=`<path d=\"M${x(0)},${y(0)} L${pts.join(\" L\")} L${x(n-1)},${y(0)} Z\" style=\"fill:var(--played)\" opacity=\".14\"\/>`;\n h+=`<polyline points=\"${pts.join(\" \")}\" style=\"fill:none;stroke:var(--played)\" stroke-width=\"2\"\/>`;\n D.moments.forEach(m=>{const i=m.ply;h+=`<circle cx=\"${x(i)}\" cy=\"${y(D.plies[i].ev)}\" r=\"5\" style=\"fill:var(--surface);stroke:var(--ink);cursor:pointer\" stroke-width=\"1.5\" data-go=\"${i}\"><title>${moveLabel(i)}${D.plies[i].san} \u2014 ${m.title}<\/title><\/circle>`});\n g.innerHTML=h;g.addEventListener(\"click\",e=>{const c=e.target.closest(\"[data-go]\");if(c){go(+c.dataset.go)}})})();\n\/\/ move list\nconst ml=document.getElementById(\"crw-movelist\");const btns=[];\nfor(let i=0;i<D.plies.length;i+=2){const no=document.createElement(\"div\");no.className=\"no\";no.textContent=(i\/2+1)+\".\";ml.appendChild(no);\n for(const j of[i,i+1]){if(j>=D.plies.length){ml.appendChild(document.createElement(\"div\"));continue}const p=D.plies[j];const b=document.createElement(\"button\");b.type=\"button\";b.className=\"mv\"+(momByPly[j]?\" key\":\"\");\n let mk=\"\";if(p.mode){mk=`<i class=\"mk\" style=\"background:${p.mode===\"unanime\"?\"var(--line)\":\"var(--played)\"}\" title=\"${p.mode}\"><\/i>`}\n b.innerHTML=`${p.san}${mk}`;b.addEventListener(\"click\",()=>go(j));ml.appendChild(b);btns[j]=b}}\nlet cur=-1;\nfunction go(i){cur=Math.max(-1,Math.min(D.plies.length-1,i));render()}\nfunction render(){const bd=document.getElementById(\"crw-board\");bd.innerHTML=\"\";\n const fen=cur<0?START:D.plies[cur].fen;bd.appendChild(boardSVG(fen,[],cur>=0?D.plies[cur].uci:null));\n btns.forEach(b=>b&&b.classList.remove(\"on\"));if(cur>=0&&btns[cur]){btns[cur].classList.add(\"on\");{const L=document.getElementById(\"crw-movelist\"),B=btns[cur];L.scrollTop+=B.getBoundingClientRect().top-L.getBoundingClientRect().top-L.clientHeight\/2}}\n const c=document.getElementById(\"crw-comment\");document.getElementById(\"crw-cur\").textContent=cur<0?\"position initiale\":`${moveLabel(cur)}${D.plies[cur].san}`;\n if(cur<0){c.innerHTML='<p>Position initiale. Avance avec \u25b6 ou clique un coup.<\/p>';return}\n const p=D.plies[cur],m=momByPly[cur];let h=\"\";\n if(m)h+=`<h3>${m.title}<\/h3><p>${m.text}<\/p>`;\n if(p.book)h+='<p class=\"small\">Coup du livre d\\'ouvertures.<\/p>';\n else if(p.props){h+=`<p class=\"small\">${p.mode===\"unanime\"?\"Les quatre membres sont d'accord : l'arbitre n'est pas consult\u00e9.\":\"Les membres divergent : l'arbitre tranche.\"}<\/p>`+propsTable(cur)}\n else if(p.mode)h+=`<p class=\"small\">${p.mode}<\/p>`;\n else h+=`<p class=\"small\">Coup de Naum 4.2.<\/p>`;\n h+=`<p class=\"small\">Stockfish apr\u00e8s le coup : ${fmt(p.ev)}${p.best&&p.best!==p.san?` \u00b7 son coup : ${p.best}`:\"\"}<\/p>`;\n c.innerHTML=h}\ndocument.getElementById(\"crw-b-start\").onclick=()=>go(-1);document.getElementById(\"crw-b-prev\").onclick=()=>go(cur-1);\ndocument.getElementById(\"crw-b-next\").onclick=()=>go(cur+1);document.getElementById(\"crw-b-end\").onclick=()=>go(D.plies.length-1);\ndocument.addEventListener(\"keydown\",e=>{const R=document.getElementById(\"crw-board\").getBoundingClientRect();if(R.bottom<0||R.top>innerHeight)return;if(e.target.closest(\"input,textarea\"))return;if(e.key===\"ArrowRight\"){go(cur+1);e.preventDefault()}if(e.key===\"ArrowLeft\"){go(cur-1);e.preventDefault()}});\ngo(31);\n})();\n<\/script>\n\n<h2><span class=\"lead-num\">7.<\/span>La d\u00e9faite la plus spectaculaire : Crux \u2013 Ethereal 11.75, 0-1<\/h2>\n<p>Crux a perdu 33 parties. Celle-ci montre le mieux sa faiblesse. Ethereal, avec les Noirs, sacrifie la qualit\u00e9 dans une Najdorf. Les quatre membres de Crux comptent le mat\u00e9riel et se croient mieux. Stockfish, lui, voit les Noirs mieux d\u00e8s le sacrifice. L’arbitre sauve plusieurs fois ce qui peut l’\u00eatre en \u00e9cartant les pires coups, mais il ne peut pas inventer un plan que personne ne propose. Le roi blanc tombe au 42<sup>e<\/sup> coup.<\/p>\n<p>C’est la limite d’un m\u00e9ta-moteur : <strong>quand tous les membres se trompent de la m\u00eame fa\u00e7on, l’arbitre ne peut rien faire.<\/strong> Quatre moteurs du d\u00e9but des ann\u00e9es 2000 partagent les m\u00eames id\u00e9es sur la valeur du mat\u00e9riel, et Ethereal en a profit\u00e9.<\/p>\n<style>\n@import url(\"https:\/\/fonts.googleapis.com\/css2?family=Barlow+Condensed:wght@500;600;700&family=Literata:opsz,wght@7..72,400;7..72,600&family=JetBrains+Mono:wght@400;600&display=swap\");\n.naum-body .crl{--bg:#f2f4f1; --surface:#ffffff; --ink:#1c2420; --muted:#5d6a63; --line:#d5dbd5;\n --sq-light:#e4e7da; --sq-dark:#86997a; --coord:#4a5a50;\n --played:#0e6f5f; --fa:#2c66b0; --mm:#b13636; --ds:#b07c0a; --hi:#7b4fa6;\n --good:#1f7a4d; --bad:#b13636;\n --f-display:\"Barlow Condensed\",\"Arial Narrow\",Arial,sans-serif;\n --f-body:\"Literata\",Georgia,\"Times New Roman\",serif;\n --f-mono:\"JetBrains 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stroke-linecap=\"butt\"><\/path><path d=\"M11 29a35 35 1 0 1 23 0M12.5 31.5h20M11.5 34.5a35 35 1 0 0 22 0M10.5 37.5a35 35 1 0 0 24 0\" fill=\"none\" stroke=\"#fff\"><\/path><\/g><g id=\"crl-black-king\" class=\"black king\" fill=\"none\" fill-rule=\"evenodd\" stroke=\"#000\" stroke-width=\"1.5\" stroke-linecap=\"round\" stroke-linejoin=\"round\"><path d=\"M22.5 11.63V6\" stroke-linejoin=\"miter\"><\/path><path d=\"M22.5 25s4.5-7.5 3-10.5c0 0-1-2.5-3-2.5s-3 2.5-3 2.5c-1.5 3 3 10.5 3 10.5\" fill=\"#000\" stroke-linecap=\"butt\" stroke-linejoin=\"miter\"><\/path><path d=\"M11.5 37c5.5 3.5 15.5 3.5 21 0v-7s9-4.5 6-10.5c-4-6.5-13.5-3.5-16 4V27v-3.5c-3.5-7.5-13-10.5-16-4-3 6 5 10 5 10V37z\" fill=\"#000\"><\/path><path d=\"M20 8h5\" stroke-linejoin=\"miter\"><\/path><path d=\"M32 29.5s8.5-4 6.03-9.65C34.15 14 25 18 22.5 24.5l.01 2.1-.01-2.1C20 18 9.906 14 6.997 19.85c-2.497 5.65 4.853 9 4.853 9M11.5 30c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0m-21 3.5c5.5-3 15.5-3 21 0\" stroke=\"#fff\"><\/path><\/g>\n<marker id=\"crl-ah-fa\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--fa)\"><\/path><\/marker><marker id=\"crl-ah-mm\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--mm)\"><\/path><\/marker><marker id=\"crl-ah-ds\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ds)\"><\/path><\/marker><marker id=\"crl-ah-hi\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--hi)\"><\/path><\/marker><marker id=\"crl-ah-sf\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--ink)\"><\/path><\/marker><marker id=\"crl-ah-pl\" viewBox=\"0 0 10 10\" refX=\"5\" refY=\"5\" markerWidth=\"3.2\" markerHeight=\"3.2\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" style=\"fill:var(--played)\"><\/path><\/marker>\n<\/defs><\/svg>\n<div class=\"wrap\">\n<div class=\"legend\"><span class=\"chip\"><i class=\"dot d-mm\"><\/i>Shredder 7<\/span><span class=\"chip\"><i class=\"dot d-fa\"><\/i>Fritz 9<\/span><span class=\"chip\"><i class=\"dot d-ds\"><\/i>Junior 8<\/span><span class=\"chip\"><i class=\"dot d-hi\"><\/i>Hiarcs 8<\/span><span class=\"chip\"><i class=\"dot d-pl\"><\/i>coup jou\u00e9<\/span><\/div>\n<div class=\"stats\" aria-label=\"Chiffres de la partie\">\n <div class=\"stat\"><span class=\"n\">33<\/span><span class=\"l\">coups de Crux apr\u00e8s le livre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">16 \/ 17<\/span><span class=\"l\">unanimes \/ tranch\u00e9s par l’arbitre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">2 \u00b7 2 \u00b7 2<\/span><span class=\"l\">coups retenus venus d’un seul membre : Shredder, Fritz, Junior<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">3<\/span><span class=\"l\">propositions \u00e9cart\u00e9es qui co\u00fbtaient plus d’un pion<\/span><\/div>\n<\/div>\n\n<section aria-labelledby=\"crl-t-graph\">\n <h2 id=\"crl-t-graph\">L’\u00e9valuation au fil de la partie<\/h2>\n <div class=\"graph\"><svg id=\"crl-graph\" viewBox=\"0 0 1000 190\" role=\"img\" aria-label=\"\u00c9valuation Stockfish du point de vue de Crux, coup par coup\"><\/svg><\/div>\n <p class=\"small\">\u00c9valuation Stockfish 17.1, du point de vue de Crux, born\u00e9e \u00e0 \u00b16 pions. Les points marquent les moments comment\u00e9s ; un clic place la partie \u00e0 ce coup.<\/p>\n<\/section>\n<section aria-labelledby=\"crl-t-mom\">\n <h2 id=\"crl-t-mom\">Les moments cl\u00e9s<\/h2>\n <p class=\"small\">Chaque diagramme montre la position avant le coup. Fl\u00e8ches : la proposition de chaque membre dans sa couleur, le coup jou\u00e9 en vert, et en pointill\u00e9 le coup de Stockfish quand aucun membre ne l’a propos\u00e9.<\/p>\n <div class=\"moments\" id=\"crl-moments\"><\/div>\n<\/section>\n<section aria-labelledby=\"crl-t-rep\">\n <h2 id=\"crl-t-rep\">Rejouer la partie<\/h2>\n <div class=\"replay\">\n <div class=\"board-col\">\n <div id=\"crl-board\"><\/div>\n <div class=\"controls\">\n <button id=\"crl-b-start\" type=\"button\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n <button id=\"crl-b-prev\" type=\"button\" aria-label=\"Coup pr\u00e9c\u00e9dent\">\u25c0<\/button>\n <button id=\"crl-b-next\" type=\"button\" aria-label=\"Coup suivant\">\u25b6<\/button>\n <button id=\"crl-b-end\" type=\"button\" aria-label=\"Fin\">\u23ed<\/button>\n <span class=\"cur\" id=\"crl-cur\"><\/span>\n <\/div>\n <div class=\"comment\" id=\"crl-comment\" aria-live=\"polite\"><\/div>\n <\/div>\n <div class=\"movelist\" id=\"crl-movelist\"><\/div>\n <\/div>\n <p class=\"small\">Fl\u00e8ches \u2190 \u2192 du clavier pour avancer et reculer.<\/p>\n<\/section>\n<footer><p>Sources : PGN du gauntlet (cutechess) et journal de Crux, qui note pour chaque coup la proposition et l’\u00e9valuation annonc\u00e9e par chaque membre (Hiarcs 8 n’annonce pas la sienne). \u00c9valuations de contr\u00f4le : Stockfish 17.1, environ 0,1 seconde par position, indicatives. Shredder donne ses mats sous forme d’un grand nombre, affich\u00e9 ici \u00ab mat \u00bb.<\/p><p>Cadences : Crux 60\/1800 (15 s par membre et environ 1 s d’arbitre par coup), adversaire 60\/900.<\/p><\/footer>\n<\/div>\n<\/div>\n<script>\n(function(){\nconst 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3\",-9998],[\"HI\",\"Rg1\",\"f1g1\",\"?\",-9998]],\"ev\":-9998,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P4q2\/2P1rB2\/R5K1\"},{\"san\":\"Dxf2+\",\"uci\":\"f3f2\",\"best\":\"Dxf2+\",\"bestu\":\"f3f2\",\"ev\":-9999,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P7\/2P1rq2\/R5K1\"},{\"san\":\"Rh1\",\"uci\":\"g1h1\",\"best\":\"Rh1\",\"bestu\":\"g1h1\",\"mode\":\"unanime\",\"props\":[[\"SH\",\"Rh1\",\"g1h1\",\"\u2212mat\",-9999],[\"FR\",\"Rh1\",\"g1h1\",\"\u2212mat 1\",-9999],[\"JU\",\"Rh1\",\"g1h1\",\"\u2212mat 3\",-9999],[\"HI\",\"Rh1\",\"g1h1\",\"?\",-9999]],\"ev\":-9999,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P7\/2P1rq2\/R6K\"},{\"san\":\"Dg2#\",\"uci\":\"f2g2\",\"best\":\"Dg2#\",\"bestu\":\"f2g2\",\"ev\":-10000,\"fen\":\"8\/6pk\/8\/5p1p\/1P6\/P7\/2P1r1q1\/R6K\"}],\"moments\":[{\"ply\":27,\"tag\":\"\",\"title\":\"14\u2026Txc3 ! Le sacrifice de qualit\u00e9\",\"text\":\"Une Najdorf classique, attaque anglaise. Ethereal donne sa tour pour le cavalier c3, puis prend le pion e4 au coup suivant. Pour le mat\u00e9riel, Crux gagne la qualit\u00e9. Mais les pi\u00e8ces noires deviennent tr\u00e8s actives, et Stockfish donne d\u00e9j\u00e0 l'avantage aux Noirs.\"},{\"ply\":34,\"tag\":\"\",\"title\":\"18.Ff2 : l'angle mort commun\",\"text\":\"Coup unanime. Shredder s'\u00e9value \u00e0 +0,52, Junior \u00e0 +0,83. Stockfish voit \u22120,54. Les quatre membres comptent la qualit\u00e9 d'avance et ne voient pas que le cavalier f5, le fou e6 et le pion e5 valent plus. Ce n'est pas un probl\u00e8me de vote : quand les quatre se trompent dans le m\u00eame sens, l'arbitre ne peut que choisir le moins mauvais coup.\"},{\"ply\":36,\"tag\":\"\",\"title\":\"19.Cd4 : l'arbitre sauve ce qui peut l'\u00eatre\",\"text\":\"Shredder, Junior et Hiarcs veulent prendre le pion a6 avec la Dame (+1,14 selon Shredder) : selon Stockfish, c'est \u22121,84. Fritz, seul, propose Cd4 (\u22120,50). L'arbitre \u00e9carte la majorit\u00e9 de trois voix et prend le coup de Fritz. Sans arbitre, Crux aurait perdu un pion et demi de plus d\u00e8s ce moment.\"},{\"ply\":43,\"tag\":\"\",\"title\":\"22\u2026Fxh3 ! Ethereal ouvre le roi\",\"text\":\"Le fou noir prend h3 et entame le roque blanc. Les membres de Crux s'\u00e9valuent toujours autour de z\u00e9ro ou en positif (Shredder +0,70). Stockfish voit \u22121,4. \u00c0 partir de l\u00e0, la courbe ne fera que descendre.\"},{\"ply\":44,\"tag\":\"\",\"title\":\"23.Dxd6 contre Dxa6\",\"text\":\"Encore le pion a6. Junior et Hiarcs veulent le prendre (\u22122,86). Shredder et Fritz pr\u00e9f\u00e8rent Dxd6 (\u22121,42). Les deux camps ont le m\u00eame nombre de voix et l'arbitre choisit le moindre mal. Pendant toute la partie, Crux a r\u00e9ussi \u00e0 \u00e9viter les pires coups. Il n'a jamais trouv\u00e9 de bon plan.\"},{\"ply\":50,\"tag\":\"\",\"title\":\"26.Rf1 : quatre avis, aucun bon\",\"text\":\"Chaque membre propose un coup diff\u00e9rent : Rf1 (Shredder, \u22123,07), Td2 (Fritz et Hiarcs, \u22123,48), a4 (Junior, \u22124,35). Shredder s'\u00e9value encore \u00e0 \u22120,66, alors que Stockfish voit trois pions de retard. Tant que tous les membres se trompent sur la position, l'arbitre n'y peut rien : il ne choisit que parmi leurs coups.\"},{\"ply\":64,\"tag\":\"\",\"title\":\"33.Dd3 : Fritz voit, Shredder non\",\"text\":\"Coup unanime, mais les \u00e9valuations n'ont plus rien \u00e0 voir entre elles. Shredder annonce 0,00, Junior \u22123,80 et Fritz \u221210,05. Fritz a compris que la partie est perdue. Shredder ne le voit pas encore.\"},{\"ply\":71,\"tag\":\"\",\"title\":\"36\u2026f3 !\",\"text\":\"36.b4 \u00e9tait la proposition de Shredder, mais peu importe : tous les coups perdent, et Fritz annonce un mat en 19. Le pion f noir avance en f3 et casse le roque blanc. Ensuite, tout est forc\u00e9 : Dxf3 Fxf3, gxf3 Dxf3+, Tf2 Fxf2.\"},{\"ply\":83,\"tag\":\"\",\"title\":\"42\u2026Dg2#\",\"text\":\"Mat en 42 coups. Ethereal 11.75, contre qui Crux ne marque que 1,5 sur 10, l'a battu avec un sacrifice positionnel que les quatre membres ont mal \u00e9valu\u00e9 ensemble. C'est le genre de d\u00e9faite qu'un m\u00e9ta-moteur ne peut pas \u00e9viter : l'arbitre ne voit que les coups qu'on lui propose.\"}],\"ids\":{\"P\":\"crl-white-pawn\",\"N\":\"crl-white-knight\",\"B\":\"crl-white-bishop\",\"R\":\"crl-white-rook\",\"Q\":\"crl-white-queen\",\"K\":\"crl-white-king\",\"p\":\"crl-black-pawn\",\"n\":\"crl-black-knight\",\"b\":\"crl-black-bishop\",\"r\":\"crl-black-rook\",\"q\":\"crl-black-queen\",\"k\":\"crl-black-king\"}};\nconst NS=\"http:\/\/www.w3.org\/2000\/svg\";\nconst COL={SH:\"mm\",FR:\"fa\",JU:\"ds\",HI:\"hi\"};const FLIP=false;\nconst NAME={SH:\"Shredder 7\",FR:\"Fritz 9\",JU:\"Junior 8\",HI:\"Hiarcs 8\"};\nconst START=\"rnbqkbnr\/pppppppp\/8\/8\/8\/8\/PPPPPPPP\/RNBQKBNR\";\nconst fenBefore=i=>i<=0?START:D.plies[i-1].fen;\nfunction moveLabel(i){const n=Math.floor(i\/2)+1;return i%2===0?n+\".\":n+\"\u2026\"}\nfunction fmt(v){if(v===null||v===undefined)return\"\u2013\";if(Math.abs(v)>=9000)return v>0?\"mat\":\"\u2212mat\";const s=(v\/100).toFixed(2).replace(\".\",\",\");return(v>0?\"+\":v<0?\"\u2212\":\"\")+s.replace(\"-\",\"\")}\nfunction sqXY(s){let f=s.charCodeAt(0)-97,k=+s[1];if(FLIP){f=7-f;k=9-k}return[f*45+22.5,(8-k)*45+22.5]}\nfunction boardSVG(fen,arrows,last){\n const svg=document.createElementNS(NS,\"svg\");svg.setAttribute(\"viewBox\",\"0 0 360 360\");svg.setAttribute(\"class\",\"bd\");svg.setAttribute(\"role\",\"img\");\n let h=\"\";\n for(let r=0;r<8;r++)for(let f=0;f<8;f++){const light=(r+f)%2===0;h+=`<rect x=\"${f*45}\" y=\"${r*45}\" width=\"45\" height=\"45\" style=\"fill:var(${light?\"--sq-light\":\"--sq-dark\"})\"\/>`}\n if(last){for(const s of[last.slice(0,2),last.slice(2,4)]){const[x,y]=sqXY(s);h+=`<rect x=\"${x-22.5}\" y=\"${y-22.5}\" width=\"45\" height=\"45\" style=\"fill:var(--played)\" opacity=\".28\"\/>`}}\n for(let f=0;f<8;f++)h+=`<text x=\"${f*45+41}\" y=\"356\" font-size=\"8\" text-anchor=\"end\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${\"abcdefgh\"[FLIP?7-f:f]}<\/text>`;\n for(let r=0;r<8;r++)h+=`<text x=\"2\" y=\"${r*45+9}\" font-size=\"8\" style=\"fill:var(--coord);font-family:var(--f-mono)\">${FLIP?r+1:8-r}<\/text>`;\n const rows=fen.split(\"\/\");\n rows.forEach((row,r)=>{let f=0;for(const c of row){if(\/\\d\/.test(c)){f+=+c;continue}h+=`<use href=\"#${D.ids[c]}\" transform=\"translate(${(FLIP?7-f:f)*45},${(FLIP?7-r:r)*45})\"\/>`;f++}});\n (arrows||[]).forEach((a,k)=>{const[x1,y1]=sqXY(a.uci.slice(0,2)),[x2,y2]=sqXY(a.uci.slice(2,4));const dx=x2-x1,dy=y2-y1,L=Math.hypot(dx,dy)||1;const off=a.off||0;const ox=-dy\/L*off,oy=dx\/L*off;const ex=x2-dx\/L*12,ey=y2-dy\/L*12;\n h+=`<line x1=\"${x1+ox}\" y1=\"${y1+oy}\" x2=\"${ex+ox}\" y2=\"${ey+oy}\" style=\"stroke:var(--${a.col===\"pl\"?\"played\":a.col===\"sf\"?\"ink\":a.col})\" stroke-width=\"${a.w||6}\" stroke-linecap=\"round\" ${a.dash?'stroke-dasharray=\"6 6\"':''} opacity=\"${a.op||.85}\" marker-end=\"url(#crl-ah-${a.col})\"\/>`});\n svg.innerHTML=h;return svg}\nfunction arrowsFor(i){\n const p=D.plies[i];const out=[];const seen={};\n (p.props||[]).forEach(([who,san,uci])=>{if(uci===\"-\"||uci===p.uci)return;seen[uci]=(seen[uci]||0)+1;const n=seen[uci]-1;out.push({uci,col:COL[who],off:n*5-2,w:5,op:.8})});\n out.push({uci:p.uci,col:\"pl\",w:7,op:.9});\n if(p.props&&p.bestu&&!p.props.some(x=>x[2]===p.bestu))out.push({uci:p.bestu,col:\"sf\",w:4,op:.9,dash:1});return out}\nfunction propsTable(i){\n const p=D.plies[i];if(!p.props)return\"\";\n let h='<table class=\"props\"><thead><tr><th>Membre<\/th><th>Coup<\/th><th class=\"num\">Machine<\/th><th class=\"num\">Stockfish<\/th><\/tr><\/thead><tbody>';\n p.props.forEach(([who,san,uci,ev,sf])=>{const ch=uci===p.uci;h+=`<tr class=\"${ch?\"chosen\":\"\"}\"><td><span class=\"chip\"><i class=\"dot d-${COL[who]}\"><\/i>${NAME[who]}<\/span><\/td><td>${san}${ch?\" \u2713\":\"\"}<\/td><td class=\"num\" title=\"\u00e9valuation annonc\u00e9e par la machine\">${ev===\"?\"?\"\u2013\":ev.replace(\"-\",\"\u2212\").replace(\".\",\",\")}<\/td><td class=\"num ${sf>0?\"pos\":sf<0?\"neg\":\"\"}\" title=\"Stockfish\">${fmt(sf)}<\/td><\/tr>`});\n h+='<\/tbody><\/table>';if(p.best&&!p.props.some(x=>x[2]===p.bestu))h+=`<div class=\"small\">Coup de Stockfish, propos\u00e9 par personne : <b>${p.best}<\/b> (fl\u00e8che en pointill\u00e9).<\/div>`;return h}\n\/\/ moments\nconst momByPly={};D.moments.forEach(m=>momByPly[m.ply]=m);\nconst mc=document.getElementById(\"crl-moments\");\nD.moments.forEach(m=>{const i=m.ply,p=D.plies[i];const card=document.createElement(\"article\");card.className=\"moment\";\n const bd=document.createElement(\"div\");bd.className=\"bd\";bd.appendChild(boardSVG(fenBefore(i),arrowsFor(i)));\n const tx=document.createElement(\"div\");tx.className=\"txt\";\n tx.innerHTML=`<span class=\"tag\">${moveLabel(i)}${p.san} \u00b7 Stockfish apr\u00e8s le coup ${fmt(p.ev)}<\/span><h3>${m.title}<\/h3><p>${m.text}<\/p>${propsTable(i)}<button type=\"button\" data-go=\"${i}\">Voir dans la partie<\/button>`;\n card.append(bd,tx);mc.appendChild(card)});\nmc.addEventListener(\"click\",e=>{const b=e.target.closest(\"[data-go]\");if(b){go(+b.dataset.go);document.getElementById(\"crl-t-rep\").scrollIntoView({behavior:\"smooth\"})}});\n\/\/ graph\n(function(){const g=document.getElementById(\"crl-graph\");const n=D.plies.length;const W=1000,H=190,L=34,R=8,T=10,B=24;\n const x=i=>L+(W-L-R)*i\/(n-1),y=v=>{v=Math.max(-600,Math.min(600,v));return T+(H-T-B)*(1-(v+600)\/1200)};\n let h=\"\";[-600,-300,0,300,600].forEach(v=>{h+=`<line x1=\"${L}\" x2=\"${W-R}\" y1=\"${y(v)}\" y2=\"${y(v)}\" style=\"stroke:var(--line)\" stroke-width=\"${v===0?1.5:1}\"\/><text x=\"${L-6}\" y=\"${y(v)+3}\" text-anchor=\"end\">${v>0?\"+\":\"\"}${v\/100}<\/text>`});\n for(let m=10;m<=Math.ceil(n\/2);m+=10){const i=2*(m-1);h+=`<text x=\"${x(i)}\" y=\"${H-6}\" text-anchor=\"middle\">${m}<\/text>`}\n const pts=D.plies.map((p,i)=>`${x(i).toFixed(1)},${y(p.ev).toFixed(1)}`);\n h+=`<path d=\"M${x(0)},${y(0)} L${pts.join(\" L\")} L${x(n-1)},${y(0)} Z\" style=\"fill:var(--played)\" opacity=\".14\"\/>`;\n h+=`<polyline points=\"${pts.join(\" \")}\" style=\"fill:none;stroke:var(--played)\" stroke-width=\"2\"\/>`;\n D.moments.forEach(m=>{const i=m.ply;h+=`<circle cx=\"${x(i)}\" cy=\"${y(D.plies[i].ev)}\" r=\"5\" style=\"fill:var(--surface);stroke:var(--ink);cursor:pointer\" stroke-width=\"1.5\" data-go=\"${i}\"><title>${moveLabel(i)}${D.plies[i].san} \u2014 ${m.title}<\/title><\/circle>`});\n g.innerHTML=h;g.addEventListener(\"click\",e=>{const c=e.target.closest(\"[data-go]\");if(c){go(+c.dataset.go)}})})();\n\/\/ move list\nconst ml=document.getElementById(\"crl-movelist\");const btns=[];\nfor(let i=0;i<D.plies.length;i+=2){const no=document.createElement(\"div\");no.className=\"no\";no.textContent=(i\/2+1)+\".\";ml.appendChild(no);\n for(const j of[i,i+1]){if(j>=D.plies.length){ml.appendChild(document.createElement(\"div\"));continue}const p=D.plies[j];const b=document.createElement(\"button\");b.type=\"button\";b.className=\"mv\"+(momByPly[j]?\" key\":\"\");\n let mk=\"\";if(p.mode){mk=`<i class=\"mk\" style=\"background:${p.mode===\"unanime\"?\"var(--line)\":\"var(--played)\"}\" title=\"${p.mode}\"><\/i>`}\n b.innerHTML=`${p.san}${mk}`;b.addEventListener(\"click\",()=>go(j));ml.appendChild(b);btns[j]=b}}\nlet cur=-1;\nfunction go(i){cur=Math.max(-1,Math.min(D.plies.length-1,i));render()}\nfunction render(){const bd=document.getElementById(\"crl-board\");bd.innerHTML=\"\";\n const fen=cur<0?START:D.plies[cur].fen;bd.appendChild(boardSVG(fen,[],cur>=0?D.plies[cur].uci:null));\n btns.forEach(b=>b&&b.classList.remove(\"on\"));if(cur>=0&&btns[cur]){btns[cur].classList.add(\"on\");{const L=document.getElementById(\"crl-movelist\"),B=btns[cur];L.scrollTop+=B.getBoundingClientRect().top-L.getBoundingClientRect().top-L.clientHeight\/2}}\n const c=document.getElementById(\"crl-comment\");document.getElementById(\"crl-cur\").textContent=cur<0?\"position initiale\":`${moveLabel(cur)}${D.plies[cur].san}`;\n if(cur<0){c.innerHTML='<p>Position initiale. Avance avec \u25b6 ou clique un coup.<\/p>';return}\n const p=D.plies[cur],m=momByPly[cur];let h=\"\";\n if(m)h+=`<h3>${m.title}<\/h3><p>${m.text}<\/p>`;\n if(p.book)h+='<p class=\"small\">Coup du livre d\\'ouvertures.<\/p>';\n else if(p.props){h+=`<p class=\"small\">${p.mode===\"unanime\"?\"Les quatre membres sont d'accord : l'arbitre n'est pas consult\u00e9.\":\"Les membres divergent : l'arbitre tranche.\"}<\/p>`+propsTable(cur)}\n else if(p.mode)h+=`<p class=\"small\">${p.mode}<\/p>`;\n else h+=`<p class=\"small\">Coup de Ethereal 11.75.<\/p>`;\n h+=`<p class=\"small\">Stockfish apr\u00e8s le coup : ${fmt(p.ev)}${p.best&&p.best!==p.san?` \u00b7 son coup : ${p.best}`:\"\"}<\/p>`;\n c.innerHTML=h}\ndocument.getElementById(\"crl-b-start\").onclick=()=>go(-1);document.getElementById(\"crl-b-prev\").onclick=()=>go(cur-1);\ndocument.getElementById(\"crl-b-next\").onclick=()=>go(cur+1);document.getElementById(\"crl-b-end\").onclick=()=>go(D.plies.length-1);\ndocument.addEventListener(\"keydown\",e=>{const R=document.getElementById(\"crl-board\").getBoundingClientRect();if(R.bottom<0||R.top>innerHeight)return;if(e.target.closest(\"input,textarea\"))return;if(e.key===\"ArrowRight\"){go(cur+1);e.preventDefault()}if(e.key===\"ArrowLeft\"){go(cur-1);e.preventDefault()}});\ngo(36);\n})();\n<\/script>\n\n<h2><span class=\"lead-num\">8.<\/span>Synth\u00e8se : Orion, Pl\u00e9iades, Crux<\/h2>\n<p>Les trois m\u00e9ta-moteurs du laboratoire suivent la m\u00eame recette : des membres d’auteurs diff\u00e9rents qui r\u00e9fl\u00e9chissent en parall\u00e8le, et Stockfish 18 qui choisit parmi leurs coups sans jamais en proposer.<\/p>\n<table>\n<thead><tr><th>M\u00e9ta-moteur<\/th><th>Membres<\/th><th class=\"num\">Moyenne des membres<\/th><th class=\"num\">Cote Ordo<\/th><th class=\"num\">Gain<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Orion<\/td><td>3 machines d\u00e9di\u00e9es (Forte A, MM IV, Designer 2100)<\/td><td class=\"num\">1788<\/td><td class=\"num\">2316<\/td><td class=\"num\">+528<\/td><\/tr>\n<tr><td>Pl\u00e9iades<\/td><td>7 machines d\u00e9di\u00e9es et programmes DOS<\/td><td class=\"num\">2147<\/td><td class=\"num\">2921<\/td><td class=\"num\">+774<\/td><\/tr>\n<tr><td>Crux<\/td><td>4 moteurs PC (Shredder, Fritz, Junior, Hiarcs)<\/td><td class=\"num\">2917<\/td><td class=\"num\">3395<\/td><td class=\"num\">+478<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>Trois le\u00e7ons ressortent.<\/p>\n<p><strong>Plus de membres, plus de gain.<\/strong> Avec trois membres, Orion gagne 528 points. Avec sept, Pl\u00e9iades en gagne 774. Trois m\u00e9ta-moteurs ne suffisent pas pour en faire une loi, mais c’est logique : plus il y a de propositions, plus l’arbitre a de chances d’y trouver un bon coup.<\/p>\n<p><strong>Le gain r\u00e9siste au niveau.<\/strong> Avec quatre membres d\u00e9j\u00e0 tr\u00e8s forts, Crux gagne encore 478 points sur leur moyenne et 419 sur le meilleur d’entre eux. Pourtant, les erreurs de moteurs \u00e0 2900 sont bien plus rares que celles de machines \u00e0 1800. \u00c0 ce niveau, les adversaires annulent beaucoup, et chaque point de performance co\u00fbte cher.<\/p>\n<p><strong>La limite est la m\u00eame partout.<\/strong> Le m\u00e9ta-moteur corrige les erreurs individuelles, pas les erreurs partag\u00e9es. Sur les 69 gaffes jou\u00e9es par Crux, 55 venaient de positions o\u00f9 tous les membres se trompaient. La diversit\u00e9 des auteurs compte autant que leur force.<\/p>\n<p>La suite est d\u00e9j\u00e0 en route. <strong>Andromeda<\/strong>, huit membres, est en train de jouer son gauntlet. On saura bient\u00f4t si huit t\u00eates font encore mieux que quatre.<\/p>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Shredder 7, Fritz 9, Junior 8 et Hiarcs 8 r\u00e9unis sous l’arbitrage de Stockfish 18 : 3395 Elo, 419 points au-dessus du meilleur membre. Analyse de 12 095 d\u00e9cisions, deux parties \u00e0 rejouer et la synth\u00e8se des trois m\u00e9ta-moteurs.<\/p>\n","protected":false},"author":1,"featured_media":4769,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":""},"categories":[72],"tags":[],"rttpg_featured_image_url":{"full":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"landscape":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"portraits":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"thumbnail":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-150x150.png",150,150,true],"medium":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-300x200.png",300,200,true],"large":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-1024x683.png",1024,683,true],"1536x1536":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"2048x2048":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur.png",1200,800,false],"neve-blog":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/crux-meta-moteur-930x620.png",930,620,true]},"rttpg_author":{"display_name":"valterd","author_link":"https:\/\/www.chess.lumn.eu\/wordpress\/author\/valterd\/"},"rttpg_comment":0,"rttpg_category":"<a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/category\/developpements\/\" rel=\"category tag\">D\u00e9veloppements<\/a>","rttpg_excerpt":"Shredder 7, Fritz 9, Junior 8 et Hiarcs 8 r\u00e9unis sous l'arbitrage de Stockfish 18 : 3395 Elo, 419 points au-dessus du meilleur membre. Analyse de 12 095 d\u00e9cisions, deux parties \u00e0 rejouer et la synth\u00e8se des trois m\u00e9ta-moteurs.","_links":{"self":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4770"}],"collection":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/comments?post=4770"}],"version-history":[{"count":1,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4770\/revisions"}],"predecessor-version":[{"id":4771,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4770\/revisions\/4771"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media\/4769"}],"wp:attachment":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media?parent=4770"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/categories?post=4770"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/tags?post=4770"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}