Sept cerveaux valent-ils mieux que trois ?<\/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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R\u00e9unies, elles jouent trois classes au-dessus de la meilleure d’entre elles \u2014 et, \u00e0 l’occasion, sacrifient \u00e0 l’unanimit\u00e9.<\/p>\n<div class=\"stats\">\n <div class=\"stat\"><b>2921<\/b><span>cote Ordo (\u00b115), 151 parties<\/span><\/div>\n <div class=\"stat\"><b>+774<\/b><span>au-dessus de la moyenne des 7 membres (2147)<\/span><\/div>\n <div class=\"stat\"><b>2722<\/b><span>cote moyenne des adversaires affront\u00e9s<\/span><\/div>\n <div class=\"stat\"><b>71,2 %<\/b><span>score sur les trois gauntlets<\/span><\/div>\n<\/div>\n<h2><span class=\"lead-num\">1.<\/span>D’Orion \u00e0 Pl\u00e9iades<\/h2>\n<p>Orion, le trio <em>(Novag Forte A + Mephisto MM IV + Fidelity Designer 2100)<\/em>, avait r\u00e9pondu \u00e0 la question \u00ab trois cerveaux valent-ils mieux qu’un ? \u00bb : mesur\u00e9 en gauntlet contre le plateau 2050-2350 du laboratoire, il est aujourd’hui cot\u00e9 <strong>2316<\/strong> par Ordo (210 parties), soit <strong>+528<\/strong> au-dessus de la moyenne de ses trois membres (1788). La force d’un m\u00e9ta-moteur ne vient pas de la puissance de ses t\u00eates, mais de la <em>diversit\u00e9 de leurs erreurs<\/em> : quand deux programmes de deux auteurs se trompent, ils se trompent rarement de la m\u00eame fa\u00e7on, et l’arbitre n’a qu’\u00e0 retenir le coup qui survit \u00e0 tous les regards.<\/p>\n<p>Si trois t\u00eates gagnent 528 points, qu’en est-il de sept ? Pl\u00e9iades reprend la recette avec <strong>sept auteurs<\/strong> et une tranche plus haute (membres de 2098 \u00e0 2188, moyenne 2147). La r\u00e8gle d’Orion \u2014 auteurs tous diff\u00e9rents \u2014 est tenue ; l’\u00e9cart interne de 90 points d\u00e9passe la limite habituelle de 75, assum\u00e9.<\/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>MChess 1.71 (486DX 33 MHz)<\/td><td>Marty Hirsch<\/td><td class=\"num\">2188<\/td><\/tr>\n<tr><td>Saitek RISC 2500 v1.04<\/td><td>Johan de Koning<\/td><td class=\"num\">2181<\/td><\/tr>\n<tr><td>Fritz 2 (486DX 33 MHz)<\/td><td>Frans Morsch<\/td><td class=\"num\">2170<\/td><\/tr>\n<tr><td>Gideon 3.1 ChessMachine (14 MHz)<\/td><td>Ed Schr\u00f6der<\/td><td class=\"num\">2150<\/td><\/tr>\n<tr><td>Fidelity Elite Avantgarde V9<\/td><td>Dan & Kathe Spracklen<\/td><td class=\"num\">2125<\/td><\/tr>\n<tr><td>Mephisto Berlin 68000 v0.03<\/td><td>Richard Lang<\/td><td class=\"num\">2118<\/td><\/tr>\n<tr><td>Novag Sapphire<\/td><td>David Kittinger<\/td><td class=\"num\">2098<\/td><\/tr>\n<tr class=\"tot\"><td>Moyenne<\/td><td>sept auteurs<\/td><td class=\"num\">2147<\/td><\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"lead-num\">2.<\/span>Comment \u00e7a marche<\/h2>\n<p>\u00c0 chaque coup, les sept machines re\u00e7oivent la position et r\u00e9fl\u00e9chissent <strong>en parall\u00e8le<\/strong>, environ 15 secondes chacune. Elles rendent sept coups (parfois le m\u00eame). <strong>Stockfish 18<\/strong>, un seul fil, environ une seconde, re\u00e7oit l’ensemble des coups propos\u00e9s <em>(go searchmoves)<\/em> et retient le meilleur. Quand les sept tombent d’accord, l’arbitre n’est <em>pas consult\u00e9<\/em> : l’unanimit\u00e9 se suffit \u00e0 elle-m\u00eame.<\/p>\n<p>La difficult\u00e9 n’est pas le choix : c’est de faire jouer ensemble sept machines r\u00e9elles dont aucune n’a d’entr\u00e9e UCI. Chacune passe par un \u00ab pont \u00bb qui la pilote, et le vrai probl\u00e8me surgit quand le coup d’un membre <em>n’est pas<\/em> retenu : il faut remettre la machine sur la position r\u00e9ellement jou\u00e9e.<\/p>\n<div class=\"callout\">\n<b>Trois ponts, trois fa\u00e7ons de rattraper un membre d\u00e9savou\u00e9.<\/b><br>\n\u2022 <b>Cartes CB-Emu<\/b> (RISC 2500, Elite V9, Berlin 68000, Sapphire), \u00e9mul\u00e9es sous MAME : la partie est <em>rejou\u00e9e<\/em> en mode \u00e9dition \u2014 gratuit, mesur\u00e9 sur des milliers de rejeux.<br>\n\u2022 <b>Relais DOS<\/b> sur 486 \u00e9mul\u00e9 (MChess, Fritz 2) : la machine <em>reprend son demi-coup<\/em> puis saisit le coup retenu, au lieu de tout retaper.<br>\n\u2022 <b>Carte ChessMachine<\/b> (Gideon) : elle re\u00e7oit chaque coup de toute fa\u00e7on, un d\u00e9saveu ne lui co\u00fbte rien.<br>\nR\u00e8gle absolue : <b>jamais de diagramme (FEN) en cours de partie<\/b> \u2014 les machines d\u00e9di\u00e9es d\u00e9duisent les droits de roque du placement et roqueraient ill\u00e9galement. On leur rejoue les coups, jamais une position.\n<\/div>\n<h2><span class=\"lead-num\">3.<\/span>Les chiffres : trois gauntlets<\/h2>\n<p>Pl\u00e9iades a disput\u00e9 trois gauntlets contre des plateaux d’adversaires de plus en plus relev\u00e9s. Les performances ci-dessous sont calcul\u00e9es sur les <strong>cotes de la liste maison<\/strong> (chess.lumn.eu). Le classement Ordo, qui p\u00e8se toutes les parties ensemble, donne depuis <strong>2921 \u00b1 15<\/strong> (151 parties) : \u00e0 5 points du chiffre pool\u00e9.<\/p>\n<table>\n<thead><tr><th>Gauntlet<\/th><th class=\"num\">Score<\/th><th class=\"num\">%<\/th><th class=\"num\">Adv. moyen<\/th><th class=\"num\">Performance<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Plateau 2350<\/td><td class=\"num\">13 \/ 14<\/td><td class=\"num\">92,9<\/td><td class=\"num\">2374<\/td><td class=\"num\">2827 \u00b1 181<\/td><\/tr>\n<tr><td>Plateau 2650<\/td><td class=\"num\">73 \/ 90<\/td><td class=\"num\">81,1<\/td><td class=\"num\">2660<\/td><td class=\"num\">2930 \u00b1 48<\/td><\/tr>\n<tr><td>Plateau 2950<\/td><td class=\"num\">19,5 \/ 45<\/td><td class=\"num\">43,3<\/td><td class=\"num\">2954<\/td><td class=\"num\">2906 \u00b1 53<\/td><\/tr>\n<tr class=\"tot\"><td>Pool\u00e9<\/td><td class=\"num\">105,5 \/ 149<\/td><td class=\"num\">70,8<\/td><td class=\"num\">2722<\/td><td class=\"num\">2916 \u00b1 35<\/td><\/tr>\n<tr class=\"tot\"><td>Ordo (2 nov. 2026)<\/td><td class=\"num\">107,5 \/ 151<\/td><td class=\"num\">71,2<\/td><td class=\"num\">\u2014<\/td><td class=\"num\">2921 \u00b1 15<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>Les trois estimations convergent autour de 2900-2930, sauf le plateau 2350 \u2014 trop faible et trop court (14 parties, \u00b1181) pour contraindre quoi que ce soit. Le chiffre pool\u00e9 est port\u00e9 par les deux plateaux hauts.<\/p>\n<div class=\"callout\">\n<b>Pl\u00e9iades vs Orion.<\/b> Au classement Ordo, Orion est cot\u00e9 2316 (+528 sur ses membres) ; Pl\u00e9iades <b>2921 (+774 sur ses membres)<\/b>. Quatre t\u00eates de plus, un gain sup\u00e9rieur \u2014 et contre une opposition bien plus forte (2722 de moyenne contre 2214). \u00c0 temp\u00e9rer : les deux n’ont pas affront\u00e9 le m\u00eame plateau, et Pl\u00e9iades partait d\u00e9j\u00e0 de membres plus forts (2147 contre 1788). Ordo a tranch\u00e9 : <b>2921 \u00b1 15<\/b>, \u00e0 5 points de l’estimation par gauntlets (2916).\n<\/div>\n<h2><span class=\"lead-num\">4.<\/span>La partie la plus spectaculaire<\/h2>\n<p>Gauntlet du plateau 2650, 29 octobre. Pl\u00e9iades (Blancs) contre <strong>Yace Paderborn, cot\u00e9 2726<\/strong> \u2014 pr\u00e8s de 600 points au-dessus de la moyenne de ses membres. Sicilienne Najdorf, \u00e9gale jusqu’au 25<sup>e<\/sup> coup. Puis, d’un seul \u00e9lan, les sept machines donnent l’\u00e9change.<\/p>\n<figure><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" viewBox=\"0 0 390 390\" width=\"380\" height=\"380\"><desc><pre>r . . . k . . r\n. . R . b . p .\np . . . . . . .\nq . p P p . . .\n. . . . P . . .\n. B . . B . . p\nP . . . . . . P\n. . . Q . . 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xlink:href=\"#black-king\" transform=\"translate(195, 15)\" \/><use href=\"#black-rook\" xlink:href=\"#black-rook\" transform=\"translate(330, 15)\" \/><\/svg><figcaption><b>Apr\u00e8s 25\u2026Cc5 \u2014 26.Txc5 !<\/b> Les sept t\u00eates, \u00e0 l’unanimit\u00e9, donnent la Tour pour le Cavalier ; l’arbitre n’est m\u00eame pas consult\u00e9. Le pion d5, lui, va devenir une force que Yace sous-estime.<\/figcaption><\/figure>\n<p>La suite tient du coll\u00e8ge bien r\u00e9gl\u00e9. Six t\u00eates poussent le pion pass\u00e9 27.d6 ; au <strong>28.Fe6<\/strong>, la majorit\u00e9 veut reprendre le pion, mais l’arbitre <em>\u00e9carte le vote<\/em> et retient l’infiltration du Fou \u2014 Pl\u00e9iades n’est pas une d\u00e9mocratie, c’est un coll\u00e8ge avec un juge. 29.d7+ revient \u00e0 l’unanimit\u00e9. Pendant une quinzaine de coups, Yace \u2014 moteur des ann\u00e9es 2000 \u2014 se croit gagnant de +5, puis son \u00e9valuation s’effondre. Plus loin, c’est le Gideon 3.1, le plus pessimiste des sept, qui trouve seul les meilleurs coups (six fois dans la partie), et le RISC 2500 qui voit seul le mat forc\u00e9. Mat au 60<sup>e<\/sup>.<\/p>\n<div class=\"callout\">\n<b>\u00c0 lire \u00e0 part.<\/b> La partie est comment\u00e9e coup par coup \u2014 l’\u00e9valuation annonc\u00e9e par chacune des sept machines, le contr\u00f4le Stockfish de chaque proposition, et un \u00e9chiquier rejouable \u2014 dans l’article compagnon \u00ab <b>Pl\u00e9iades \u2013 Yace Paderborn<\/b> \u00bb. Sur 50 coups hors livre : 10 unanimes, 40 tranch\u00e9s par l’arbitre, et <b>21 gaffes de membres \u00e9cart\u00e9es<\/b>.\n<\/div>\n<h2><span class=\"lead-num\">5.<\/span>Pl\u00e9iadesRT : jouer en temps r\u00e9el, \u00e0 l’horloge de n’importe quelle interface<\/h2>\n<p>En gauntlet, Pl\u00e9iades peut se permettre de rejouer toute la partie \u00e0 chaque membre d\u00e9savou\u00e9 : l’interface encaisse. Mais pour en faire un moteur UCI <em>jouable<\/em> dans n’importe quelle interface \u2014 Banksia, cutechess \u2014 qui lui impose <strong>sa<\/strong> pendule, il fallait que Pl\u00e9iades tienne r\u00e9ellement ~15 secondes par coup, rejeu compris. C’est Pl\u00e9iadesRT. Les mesures prises :<\/p>\n<h3>L’instantan\u00e9 remplace le rejeu<\/h3>\n<p>Au lieu de rejouer la partie depuis le d\u00e9but, chaque carte CB-Emu prend un <strong>instantan\u00e9 de l’\u00e9tat machine<\/strong> (sauvegarde MAME programm\u00e9e \u00e0 la trame, avec notification apr\u00e8s rechargement) et y revient. Co\u00fbt du retour : <strong>0,06 s<\/strong> au lieu de plusieurs secondes de rejeu qui enflent avec la partie. La variante en m\u00e9moire <em>(buffer_save)<\/em> a \u00e9t\u00e9 \u00e9cart\u00e9e : cass\u00e9e par les timers anonymes de MAME, elle faisait d\u00e9river l’horloge interne.<\/p>\n<h3>Soit tous passent, soit aucun<\/h3>\n<p>Les quatre cartes CB-Emu (Elite V9, RISC 2500, Berlin 68000, Sapphire) ont \u00e9t\u00e9 valid\u00e9es une \u00e0 une : d\u00e9synchronisation puis trois demi-coups en mode \u00e9dition, chacune devait repartir juste. Au passage, portage du greffon vers MAME 0.275 (la matrice de diodes du V9 \u00e9tait en miroir, les bits de touches invers\u00e9s).<\/p>\n<h3>Temps adaptatif et pr\u00e9-positionnement<\/h3>\n<p>Chaque membre re\u00e7oit une cible de 15 s, un plancher de 3 s, moins un surco\u00fbt propre \u00e0 son chemin de resynchronisation (instantan\u00e9, pr\u00e9-pose, liste, rejeu), liss\u00e9 d’un coup \u00e0 l’autre, pour viser <strong>~15 s r\u00e9elles au total<\/strong>. Mieux : pendant que l’adversaire r\u00e9fl\u00e9chit, un membre peut <strong>pr\u00e9-positionner<\/strong> les demi-coups d\u00e9j\u00e0 connus (resync + pose \u00e0 l’avance), de sorte qu’\u00e0 son tour il n’ait plus qu’\u00e0 calculer. Le Sapphire, muet apr\u00e8s une pr\u00e9-pose, en est exclu et resynchronise au dernier moment.<\/p>\n<h3>Compatible avec l’horloge Banksia<\/h3>\n<p>La cible de temps est <strong>born\u00e9e par la pendule re\u00e7ue<\/strong> au <em>go<\/em> (wtime\/btime\/movestogo, avec une r\u00e9serve de ~10 s) : Pl\u00e9iadesRT respecte la cadence que lui impose l’interface au lieu d’imposer ses 15 s. Un plafond de marge au premier coup (4\u00d7 puis 2\u00d7 la cible) \u00e9vite qu’une t\u00eate lente ne bloque la partie, et la nvram est remise \u00e0 z\u00e9ro au d\u00e9marrage \u2014 une partie mat\u00e9e y persistait et faisait refuser la suivante.<\/p>\n<div class=\"callout\">\n<b>Authentique, pas acc\u00e9l\u00e9r\u00e9.<\/b> Pendant sa r\u00e9flexion, chaque carte tourne \u00e0 la vitesse <b>nominale<\/b> du processeur d’\u00e9poque : en 13 s de calcul elle calcule exactement ce qu’aurait calcul\u00e9 la vraie machine en 13 s. Seule l’intendance \u2014 poser les pi\u00e8ces, lire le coup \u2014 tourne d\u00e9brid\u00e9e, et ne compte pas comme de la r\u00e9flexion. La force reproduite est celle de l’original, pas une version dop\u00e9e.\n<\/div>\n<h3>Le gauntlet : m\u00eame force, \u00e0 ~80 Elo pr\u00e8s<\/h3>\n<p>Pl\u00e9iadesRT a ensuite disput\u00e9 son propre gauntlet sur le plateau 2650, contre les <strong>neuf m\u00eames adversaires<\/strong> que la version de laboratoire \u2014 la comparaison la plus juste possible. R\u00e9sultat sur 99 parties : <strong>71,5 \/ 99 (72 %), performance 2838 \u00b1 40<\/strong>, contre <strong>2930<\/strong> pour la version gauntlet (qui rejoue toute la partie) sur le m\u00eame plateau. Le classement Ordo confirme l’ordre de grandeur : <strong>Pl\u00e9iadesRT 2839 \u00b1 18<\/strong> contre <strong>Pl\u00e9iades 2921 \u00b1 15<\/strong>. Le passage au temps r\u00e9el co\u00fbte donc de l’ordre de <strong>80 Elo<\/strong>.<\/p>\n<table>\n<thead><tr><th>Adversaire<\/th><th class=\"num\">Cote<\/th><th class=\"num\">Pl\u00e9iades (labo)<\/th><th class=\"num\">Pl\u00e9iadesRT<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Rebel 12 (P90)<\/td><td class=\"num\">2514<\/td><td class=\"num\">100 %<\/td><td class=\"num\">86 %<\/td><\/tr>\n<tr><td>Chess Genius 1 (P90)<\/td><td class=\"num\">2533<\/td><td class=\"num\">80 %<\/td><td class=\"num\">100 %<\/td><\/tr>\n<tr><td>Chess Genius 3 (P90)<\/td><td class=\"num\">2577<\/td><td class=\"num\">95 %<\/td><td class=\"num\">86 %<\/td><\/tr>\n<tr><td>Stockfish 11 68040<\/td><td class=\"num\">2610<\/td><td class=\"num\">90 %<\/td><td class=\"num\">82 %<\/td><\/tr>\n<tr><td>Rebel 6.0<\/td><td class=\"num\">2674<\/td><td class=\"num\">65 %<\/td><td class=\"num\">68 %<\/td><\/tr>\n<tr><td>Yace Paderborn<\/td><td class=\"num\">2726<\/td><td class=\"num\">90 %<\/td><td class=\"num\">77 %<\/td><\/tr>\n<tr><td>Nimzo 8<\/td><td class=\"num\">2757<\/td><td class=\"num\">85 %<\/td><td class=\"num\">45 %<\/td><\/tr>\n<tr><td>WildCat 8<\/td><td class=\"num\">2764<\/td><td class=\"num\">50 %<\/td><td class=\"num\">59 %<\/td><\/tr>\n<tr><td>Shredder 5.32<\/td><td class=\"num\">2781<\/td><td class=\"num\">75 %<\/td><td class=\"num\">45 %<\/td><\/tr>\n<tr class=\"tot\"><td>Performance<\/td><td class=\"num\">~2660<\/td><td class=\"num\">2930 \u00b1 48<\/td><td class=\"num\">2838 \u00b1 40<\/td><\/tr>\n<tr class=\"tot\"><td>Cote Ordo<\/td><td class=\"num\"><\/td><td class=\"num\">2921 \u00b1 15<\/td><td class=\"num\">2839 \u00b1 18<\/td><\/tr>\n<\/tbody>\n<\/table>\n<div class=\"callout\">\n<b>O\u00f9 se loge le co\u00fbt.<\/b> Les deux versions jouent <b>proprement<\/b> \u2014 z\u00e9ro incident, m\u00e9diane 15 s par coup de part et d’autre. L’\u00e9cart est <b>concentr\u00e9 sur les deux adversaires les plus forts<\/b>, Nimzo 8 (45 % contre 85 %) et Shredder 5.32 (45 % contre 75 %), et quasi nul ailleurs. C’est coh\u00e9rent avec la seule diff\u00e9rence structurelle : un membre dont la resynchro co\u00fbte cher r\u00e9fl\u00e9chit un peu moins que ses 15 s pleines, ce qui ne p\u00e8se que dans les parties serr\u00e9es contre le haut du plateau. Un prix mod\u00e9r\u00e9 pour un m\u00e9ta-moteur r\u00e9ellement jouable en temps r\u00e9el dans n’importe quelle interface.\n<\/div>\n<p class=\"note\">Essai de mise au point : partie gagn\u00e9e contre Fritz 2, m\u00e9diane 15,1 s par coup \u00e0 60\/900, z\u00e9ro incident. Cotes Ordo du 2 novembre 2026 : Pl\u00e9iades 2921, Pl\u00e9iadesRT 2839.<\/p>\n<footer>\n<h2>Notes<\/h2>\n<ul>\n<li>Performances calcul\u00e9es sur les cotes de la liste maison (chess.lumn.eu, \u00ab Performance elo, tournois maison \u00bb), par r\u00e9solution de R tel que la somme des scores attendus \u00e9gale le score r\u00e9alis\u00e9 ; \u00b1 = erreur-type (adversaires suppos\u00e9s exacts). Le classement Ordo du 2 novembre 2026 (toutes parties) donne Pl\u00e9iades 2921 \u00b1 15, Pl\u00e9iadesRT 2839 \u00b1 18, Orion 2316 \u00b1 11.<\/li>\n<li>149 parties cot\u00e9es sur 151 (deux parties contre un adversaire non cot\u00e9 \u00e9cart\u00e9es).<\/li>\n<li>Les \u00e9valuations des sept membres proviennent des journaux du m\u00e9ta-moteur de la partie cit\u00e9e (Pl\u00e9iades \u2013 Yace, 29\/10\/2026) ; valeurs en pions, du point de vue du membre.<\/li>\n<\/ul>\n<\/footer>\n<\/article>\n<\/body>\n<\/html>\n\n\n\n<title>Pl\u00e9iades \u2013 Yace Paderborn, partie comment\u00e9e<\/title>\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, viewport-fit=cover\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"stylesheet\" 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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<header>\n <div class=\"eyebrow\">Gauntlet de Pl\u00e9iades, adversaires cot\u00e9s ~2650 \u00b7 29 octobre 2026<\/div>\n <h1>Pl\u00e9iades \u2013 Yace Paderborn<\/h1>\n <div class=\"players\"><span>Pl\u00e9iades (m\u00e9ta-moteur)<b>Ordo 2921<\/b><\/span><span>Yace Paderborn<b>2726<\/b><\/span><span>1-0 en 60 coups<\/span><\/div>\n <p class=\"lede\">Sicilienne Najdorf. Pl\u00e9iades joue avec sept machines de sept auteurs : chacune r\u00e9fl\u00e9chit 15 secondes, et quand elles ne s’accordent pas, Stockfish 18 choisit en une seconde parmi leurs propositions. Ici les sept donnent l’\u00e9change d’un seul \u00e9lan ; puis, coup apr\u00e8s coup, c’est le plus pessimiste d’entre elles \u2014 le Gideon 3.1 \u2014 et le RISC 2500 qui trouvent seuls les coups d\u00e9cisifs, pendant qu’un moteur trois classes au-dessus se croit gagnant.<\/p>\n <div class=\"legend\"><span class=\"chip\"><i class=\"dot\" style=\"background:#3366cc\"><\/i>MChess 1.71 <b>Hirsch<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#cc3333\"><\/i>RISC 2500 <b>de Koning<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#d99400\"><\/i>Fritz 2 <b>Morsch<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#8e44ad\"><\/i>Gideon 3.1 <b>Schr\u00f6der<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#e67e22\"><\/i>Elite V9 <b>Spracklen<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#17a2b8\"><\/i>Berlin 68000 <b>Lang<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#c0397f\"><\/i>Sapphire <b>Kittinger<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:var(--played)\"><\/i>coup jou\u00e9<\/span><\/div>\n<\/header>\n\n<div class=\"stats\" aria-label=\"Chiffres de la partie\">\n <div class=\"stat\"><span class=\"n\">50<\/span><span class=\"l\">coups de Pl\u00e9iades apr\u00e8s le livre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">10 \/ 40<\/span><span class=\"l\">unanimes \/ tranch\u00e9s par l’arbitre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">Gideon 3.1 6 \u00b7 RISC 2500 4 \u00b7 Sapphire 2 \u00b7 MChess 1.71 2 \u00b7 Berlin 68000 1<\/span><span class=\"l\">coups retenus venus d’un seul membre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">21<\/span><span class=\"l\">gaffes de membres \u00e9cart\u00e9es (\u2265 1,5 pion selon Stockfish)<\/span><\/div>\n<\/div>\n\n<section>\n <h2>L’\u00e9valuation au fil de la partie<\/h2>\n <div class=\"graph\"><svg id=\"graph\" viewBox=\"0 0 1000 200\" role=\"img\" aria-label=\"\u00c9valuation Stockfish du point de vue de Pl\u00e9iades, coup par coup\"><\/svg><\/div>\n <p class=\"small\">\u00c9valuation Stockfish 16 du point de vue de Pl\u00e9iades, apr\u00e8s chaque coup jou\u00e9 (plafonn\u00e9e \u00e0 \u00b110 ; au-del\u00e0, c’est le mat).<\/p>\n<\/section>\n\n<section>\n <h2>Les moments cl\u00e9s<\/h2>\n <p class=\"small\">Chaque diagramme montre la position avant le coup. Fl\u00e8ches : les propositions des membres (couleur du membre si un seul la propose, gris si plusieurs), le coup jou\u00e9 en vert. Le tableau donne, pour chaque t\u00eate, son coup, son \u00e9valuation affich\u00e9e et le contr\u00f4le Stockfish.<\/p>\n <div class=\"moments\" id=\"moments\"><\/div>\n<\/section>\n\n<section>\n <h2>Rejouer la partie<\/h2>\n <div class=\"replay\">\n <div class=\"board-col\">\n <div id=\"board\"><\/div>\n <div class=\"controls\">\n <button id=\"b-start\" type=\"button\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n <button id=\"b-prev\" type=\"button\" aria-label=\"Pr\u00e9c\u00e9dent\">\u25c0<\/button>\n <button id=\"b-next\" type=\"button\" aria-label=\"Suivant\">\u25b6<\/button>\n <button id=\"b-end\" type=\"button\" aria-label=\"Fin\">\u23ef<\/button>\n <span class=\"cur\" id=\"cur\"><\/span>\n <\/div>\n <div class=\"comment\" id=\"comment\" aria-live=\"polite\"><\/div>\n <\/div>\n <div class=\"movelist\" id=\"movelist\"><\/div>\n <\/div>\n <p class=\"small\">Fl\u00e8ches \u2190 \u2192 du clavier pour avancer et reculer.<\/p>\n<\/section>\n\n<footer>\n <p>Sources : PGN du gauntlet (cutechess) et journal de Pl\u00e9iades, qui note pour chaque coup la proposition et l’\u00e9valuation annonc\u00e9e par chacune des sept machines, ainsi que la d\u00e9cision de l’arbitre. \u00c9valuations de contr\u00f4le : Stockfish 16, ~0,2 s par position, indicatives.<\/p>\n <p>Les \u00e9valuations \u00ab machine \u00bb sont celles annonc\u00e9es par chaque programme d’\u00e9poque : leurs coups sont fiables, leurs chiffres approximatifs. Livre jusqu’au 10<sup>e<\/sup> coup. Cadences : Pl\u00e9iades 60\/6000, Yace 60\/900. 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0 1\"}, MEM=[{\"k\": \"MChess\", \"nom\": \"MChess 1.71\", \"auteur\": \"Hirsch\", \"cote\": 2188, \"col\": \"#3366cc\"}, {\"k\": \"Saitek\", \"nom\": \"RISC 2500\", \"auteur\": \"de Koning\", \"cote\": 2181, \"col\": \"#cc3333\"}, {\"k\": \"Fritz\", \"nom\": \"Fritz 2\", \"auteur\": \"Morsch\", \"cote\": 2170, \"col\": \"#d99400\"}, {\"k\": \"Gideon\", \"nom\": \"Gideon 3.1\", \"auteur\": \"Schr\u00f6der\", \"cote\": 2150, \"col\": \"#8e44ad\"}, {\"k\": \"Fidelity\", \"nom\": \"Elite V9\", \"auteur\": \"Spracklen\", \"cote\": 2125, \"col\": \"#e67e22\"}, {\"k\": \"Mephisto\", \"nom\": \"Berlin 68000\", \"auteur\": \"Lang\", \"cote\": 2118, \"col\": \"#17a2b8\"}, {\"k\": \"Novag\", \"nom\": \"Sapphire\", \"auteur\": \"Kittinger\", \"cote\": 2098, \"col\": \"#c0397f\"}], MOM=[[9, \"Le pessimiste a raison\", \"Six t\u00eates reprennent en d2. Le Gideon 3.1 \u2014 le plus pessimiste des sept, il sous-\u00e9value tout \u2014 joue seul <b>19.Fxc4<\/b>, reprendre de la bonne pi\u00e8ce. L'arbitre le suit contre les six autres.\"], [15, \"Une gaffe \u00e0 3,7 pions \u00e9cart\u00e9e\", \"Le RISC 2500 et l'Elite V9 proposent l'\u00e9chec <b>25\u2026Tc8+<\/b>, qui rend tout l'avantage (\u22121,97). Les cinq autres reprennent simplement en e4 ; l'arbitre valide. Deux t\u00eates voulaient jeter la partie.\"], [16, \"Les sept sacrifient d'un seul \u00e9lan\", \"<b>26.Txc5 !<\/b> La Tour pour le Cavalier, \u00e0 l'unanimit\u00e9 : aucune t\u00eate n'a flanch\u00e9, l'arbitre n'est pas consult\u00e9. Le pion d5 va devenir une force que l'adversaire sous-estime.\"], [18, \"L'arbitre \u00e9carte la majorit\u00e9\", \"Quatre t\u00eates reprennent le pion (Fxc5, +3,88) ; seuls MChess et Gideon infiltrent le Fou en <b>28.Fe6<\/b> (+6,18). L'arbitre contredit le vote \u2014 deux pions et demi de mieux.\"], [43, \"Le RISC 2500 voit seul le mat\", \"<b>53.Fd3 !<\/b> Le RISC 2500 est la seule t\u00eate \u00e0 voir le mat forc\u00e9 ; les quatre autres se contentent de +14. Le Fou enferme le Roi noir sur la colonne g.\"], [50, \"Mat du Fou\u2026 non, de la Dame\", \"Deux mats au choix : le RISC 2500 annonce <b>60.De4#<\/b>, le Gideon <b>60.Df3#<\/b>. L'arbitre joue celui du Gideon. Deux Dames promues referment le filet.\"]];\nconst COL={}; MEM.forEach(m=>COL[m.k]=m.col); const PLAYED=\"#0b7a52\";\nconst NAM={}; MEM.forEach(m=>NAM[m.k]=m.nom);\nfunction fr(s){return (s||\"\").replace(\/[KQRBN]\/g,c=>({K:\"R\",Q:\"D\",R:\"T\",B:\"F\",N:\"C\"}[c]));}\nfunction fmt(v){if(v===null||v===undefined)return\"\u2013\";if(Math.abs(v)>=90)return v>0?\"#\":\"\u2212#\";const s=Math.abs(v).toFixed(2).replace(\".\",\",\");return (v>0?\"+\":v<0?\"\u2212\":\"\")+s;}\nfunction cls(v){return v===null||v===undefined?\"\":v>0.15?\"pos\":v<-0.15?\"neg\":\"\";}\n\/\/ --- echiquier depuis FEN ---\nconst GLYbw={\"P\":\"white-pawn\",\"N\":\"white-knight\",\"B\":\"white-bishop\",\"R\":\"white-rook\",\"Q\":\"white-queen\",\"K\":\"white-king\",\n \"p\":\"black-pawn\",\"n\":\"black-knight\",\"b\":\"black-bishop\",\"r\":\"black-rook\",\"q\":\"black-queen\",\"k\":\"black-king\"};\nfunction sqXY(s){return [(s.charCodeAt(0)-97)*45+22.5,(8-(+s[1]))*45+22.5];}\nfunction boardSVG(fen,arrows,last){\n let s='<svg class=\"bd\" viewBox=\"-2 -2 364 364\">';\n const rows=fen.split(\" \")[0].split(\"\/\");\n for(let r=0;r<8;r++)for(let c=0;c<8;c++){const lt=(r+c)%2===0;\n s+='<rect x=\"'+(c*45)+'\" y=\"'+(r*45)+'\" width=\"45\" height=\"45\" fill=\"'+(lt?\"var(--sq-light)\":\"var(--sq-dark)\")+'\"\/>';}\n if(last){[\"from\",\"to\"].forEach(k=>{const[x,y]=sqXY(last[k]);s+='<rect x=\"'+(x-22.5)+'\" y=\"'+(y-22.5)+'\" width=\"45\" height=\"45\" fill=\"'+PLAYED+'\" opacity=\"0.18\"\/>';});}\n for(let r=0;r<8;r++){let c=0;for(const ch of rows[r]){if(\/\\d\/.test(ch)){c+=+ch;}else{\n const g=GLYbw[ch];if(g)s+='<use href=\"#'+g+'\" x=\"'+(c*45)+'\" y=\"'+(r*45)+'\"\/>';c++;}}}\n (arrows||[]).forEach(a=>{const[x1,y1]=sqXY(a.from),[x2,y2]=sqXY(a.to);\n const dx=x2-x1,dy=y2-y1,L=Math.hypot(dx,dy),ux=dx\/L,uy=dy\/L;const x2b=x2-ux*16,y2b=y2-uy*16;\n s+='<line x1=\"'+x1+'\" y1=\"'+y1+'\" x2=\"'+x2b+'\" y2=\"'+y2b+'\" stroke=\"'+a.col+'\" stroke-width=\"'+(a.played?6:3.5)+'\" opacity=\"'+(a.played?0.95:0.7)+'\" marker-end=\"url(#ah-'+a.id+')\"\/>';});\n s+='<\/svg>';return s;\n}\n\/\/ marqueurs de fl\u00e8ches (un par couleur utilis\u00e9e)\n(function(){let defs=document.querySelector(\"#arrowdefs\");if(!defs){defs=document.createElementNS(\"http:\/\/www.w3.org\/2000\/svg\",\"svg\");defs.id=\"arrowdefs\";defs.setAttribute(\"width\",\"0\");defs.setAttribute(\"height\",\"0\");defs.style.position=\"absolute\";document.body.appendChild(defs);}\n const cols={played:PLAYED,multi:\"#8a8f86\"};MEM.forEach(m=>cols[m.k]=m.col);\n let h='<defs>';for(const id in cols){h+='<marker id=\"ah-'+id+'\" viewBox=\"0 0 10 10\" refX=\"7\" refY=\"5\" markerWidth=\"4\" markerHeight=\"4\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" fill=\"'+cols[id]+'\"\/><\/marker>';}h+='<\/defs>';defs.innerHTML=h;})();\nfunction arrowsFor(o){const arr=[];const chosen=o.chosen;\n for(const u in o.distinct){const d=o.distinct[u];const mult=d.members.length>1;const played=(u===chosen);\n arr.push({from:u.slice(0,2),to:u.slice(2,4),played:played,\n col:played?PLAYED:(mult?\"#8a8f86\":COL[d.members[0]]),id:played?\"played\":(mult?\"multi\":d.members[0])});}\n \/\/ le coup jou\u00e9 en dernier (au-dessus)\n arr.sort((a,b)=>(a.played?1:0)-(b.played?1:0));return arr;\n}\nfunction propsTable(o){\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 MEM.forEach(m=>{const pr=o.props[m.k];if(!pr)return;const u=pr[0];const mach=pr[1];const d=o.distinct[u]||{};\n const sf=d.ev;const chosen=(u===o.chosen);\n const mv=d.san?fr(d.san):u;\n let machn=mach.replace(\"+M\",\"#\").replace(\"-M\",\"\u2212#\").replace(\"+\",\"+\").replace(\"-\",\"\u2212\").replace(\".\",\",\");\n h+='<tr class=\"'+(chosen?\"chosen\":\"\")+'\"><td><span class=\"mdot\" style=\"background:'+m.col+'\"><\/span>'+m.nom+'<\/td><td>'+mv+'<\/td><td class=\"num\">'+machn+'<\/td><td class=\"num '+cls(sf)+'\">'+fmt(sf)+'<\/td><\/tr>';});\n h+='<\/tbody><\/table>';return h;\n}\n\/\/ --- moments ---\nconst outByN={};D.out.forEach(o=>outByN[o.n]=o);\nconst momDiv=document.getElementById(\"moments\");\nMOM.forEach(([n,titre,comm])=>{const o=outByN[n];if(!o)return;\n const last={from:o.uci.slice(0,2),to:o.uci.slice(2,4)};\n const tag=(o.typ===\"unanime\"?\"Unanime\":\"Arbitr\u00e9\")+(o.arb&&o.arb.indexOf(\"consult\")<0?\" \u00b7 Stockfish \"+o.arb.replace(\".\",\",\"):\"\");\n const div=document.createElement(\"div\");div.className=\"moment\";\n div.innerHTML='<div class=\"bd-wrap\">'+boardSVG(o.fen_before,arrowsFor(o),null)+'<\/div>'+\n '<div class=\"txt\"><h3>'+o.move_no+'. '+fr(o.san)+' \u2014 '+titre+'<\/h3><p class=\"tag\">'+tag+'<\/p><p>'+comm+'<\/p>'+propsTable(o)+'<\/div>';\n momDiv.appendChild(div);});\n\/\/ --- graphe eval ---\n(function(){const svg=document.getElementById(\"graph\");const W=1000,H=200,P=28;\n const xs=D.curve.map(p=>p.x),ys=D.curve.map(p=>Math.max(-10,Math.min(10,p.y)));\n const x0=Math.min(...xs),x1=Math.max(...xs);\n const X=v=>P+(v-x0)\/(x1-x0)*(W-2*P), Y=v=>H\/2-(v\/10)*(H\/2-P);\n let h='';\n h+='<rect x=\"0\" y=\"0\" width=\"'+W+'\" height=\"'+(H\/2)+'\" fill=\"rgba(11,122,82,0.05)\"\/>';\n h+='<rect x=\"0\" y=\"'+(H\/2)+'\" width=\"'+W+'\" height=\"'+(H\/2)+'\" fill=\"rgba(177,54,54,0.05)\"\/>';\n [ -10,-5,0,5,10].forEach(v=>{h+='<line x1=\"'+P+'\" y1=\"'+Y(v)+'\" x2=\"'+(W-P)+'\" y2=\"'+Y(v)+'\" stroke=\"var(--line)\" stroke-width=\"1\"\/>';h+='<text x=\"2\" y=\"'+(Y(v)+3)+'\">'+(v>0?\"+\":\"\")+v+'<\/text>';});\n let dpath=\"\";D.curve.forEach((p,i)=>{dpath+=(i?\"L\":\"M\")+X(p.x)+\",\"+Y(Math.max(-10,Math.min(10,p.y)));});\n h+='<path d=\"'+dpath+'\" fill=\"none\" stroke=\"'+PLAYED+'\" stroke-width=\"2.5\"\/>';\n D.curve.forEach(p=>{h+='<circle cx=\"'+X(p.x)+'\" cy=\"'+Y(Math.max(-10,Math.min(10,p.y)))+'\" r=\"2.6\" fill=\"'+PLAYED+'\"\/>';});\n [11,20,26,30,40,50,60].forEach(v=>{if(v>=x0&&v<=x1)h+='<text x=\"'+X(v)+'\" y=\"'+(H-6)+'\" text-anchor=\"middle\">'+v+'<\/text>';});\n svg.innerHTML=h;})();\n\/\/ --- rejeu ---\nconst R=D.replay;let cur=-1;\nconst bd=document.getElementById(\"board\"),cm=document.getElementById(\"comment\"),curEl=document.getElementById(\"cur\");\nconst ml=document.getElementById(\"movelist\");const btns=[];\n(function(){let h=\"\";for(let i=0;i<R.length;i+=2){const no=i\/2+1;\n h+='<div class=\"no\">'+no+'.<\/div>';\n h+='<button class=\"mv\" data-i=\"'+i+'\">'+cell(i)+'<\/button>';\n h+=(i+1<R.length)?'<button class=\"mv\" data-i=\"'+(i+1)+'\">'+cell(i+1)+'<\/button>':'<div><\/div>';}\n ml.innerHTML=h;ml.querySelectorAll(\".mv\").forEach(b=>{btns[+b.dataset.i]=b;b.onclick=()=>go(+b.dataset.i);});})();\nfunction cell(i){const r=R[i];const key=r.n&&MOM.some(m=>m[0]===r.n);return '<span class=\"mk\" style=\"background:'+(r.n?PLAYED:\"transparent\")+'\"><\/span>'+(key?'<span class=\"key\">'+fr(r.san)+'<\/span>':fr(r.san));}\nfunction moveLabel(i){const n=Math.floor(i\/2)+1;return i%2===0?n+\".\":n+\"\u2026\";}\nfunction go(i){cur=Math.max(-1,Math.min(R.length-1,i));render();}\nfunction render(){\n const fen=cur<0?D.start_fen:R[cur].fen;\n let last=null;if(cur>=0){const u=uciOf(cur);if(u)last={from:u.slice(0,2),to:u.slice(2,4)};}\n bd.innerHTML=boardSVG(fen,[],last);\n curEl.textContent=cur<0?\"position de d\u00e9part\":(moveLabel(cur)+\" \"+fr(R[cur].san));\n btns.forEach((b,i)=>b&&b.classList.toggle(\"on\",i===cur));\n if(cur>=0&&btns[cur])btns[cur].scrollIntoView({block:\"nearest\"});\n \/\/ commentaire si moment\n let c=\"\";if(cur>=0&&R[cur].n){const mm=MOM.find(m=>m[0]===R[cur].n);if(mm)c='<h3>'+mm[1]+'<\/h3><p>'+mm[2]+'<\/p>';\n else{const o=outByN[R[cur].n];if(o){const pr=o.distinct[o.chosen];const prs=pr?pr.members.map(k=>NAM[k]).join(\", \"):\"\";\n c='<p class=\"tag\">'+(o.typ===\"unanime\"?\"Unanime\":\"Arbitr\u00e9\")+'<\/p><p>Retenu : '+fr(R[cur].san)+' \u2014 propos\u00e9 par '+prs+'.<\/p>';}}}\n cm.innerHTML=c||'<p class=\"small\">Cliquez un coup ou utilisez les fl\u00e8ches.<\/p>';\n}\n\/\/ reconstruire l'uci du coup i : on ne l'a pas stock\u00e9, on le deduit via FEN precedente -> trop lourd ; on surligne via san only\nfunction uciOf(i){const o=R[i].n?outByN[R[i].n]:null;return o?o.uci:null;}\ndocument.getElementById(\"b-start\").onclick=()=>go(-1);\ndocument.getElementById(\"b-prev\").onclick=()=>go(cur-1);\ndocument.getElementById(\"b-next\").onclick=()=>go(cur+1);\ndocument.getElementById(\"b-end\").onclick=()=>go(R.length-1);\ndocument.addEventListener(\"keydown\",e=>{if(e.key===\"ArrowLeft\"){go(cur-1);e.preventDefault();}if(e.key===\"ArrowRight\"){go(cur+1);e.preventDefault();}});\ngo(-1);\n<\/script>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Sept cerveaux valent-ils mieux que trois ? Laboratoire \u00b7 m\u00e9ta-moteur Sept cerveaux valent-ils mieux que trois ? Apr\u00e8s Orion, le trio, voici Pl\u00e9iades : sept machines d’\u00e9checs des ann\u00e9es 1980-90, sept auteurs diff\u00e9rents, un arbitre Stockfish 18. R\u00e9unies, elles jouent trois classes au-dessus de la meilleure d’entre elles \u2014 et, \u00e0 l’occasion, sacrifient \u00e0 l’unanimit\u00e9. 2921cote Ordo (\u00b115),… <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/02\/meta-moteur-pleiades-uci\/\" class=\"\" rel=\"bookmark\">Read More »<span class=\"screen-reader-text\">Meta moteur ‘Shahmatic Pl\u00e9iades-UCI’<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":4631,"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":[53,34],"tags":[],"rttpg_featured_image_url":{"full":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"landscape":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"portraits":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"thumbnail":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-150x150.png",150,150,true],"medium":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-300x300.png",300,300,true],"large":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-1024x1024.png",1024,1024,true],"1536x1536":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"2048x2048":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"neve-blog":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-930x620.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\/blog\/\" rel=\"category tag\">Blog<\/a> <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/category\/test\/\" rel=\"category tag\">Test<\/a>","rttpg_excerpt":"Sept cerveaux valent-ils mieux que trois ? Laboratoire \u00b7 m\u00e9ta-moteur Sept cerveaux valent-ils mieux que trois ? Apr\u00e8s Orion, le trio, voici Pl\u00e9iades : sept machines d’\u00e9checs des ann\u00e9es 1980-90, sept auteurs diff\u00e9rents, un arbitre Stockfish 18. R\u00e9unies, elles jouent trois classes au-dessus de la meilleure d’entre elles \u2014 et, \u00e0 l’occasion, sacrifient \u00e0 l’unanimit\u00e9. 2921cote Ordo (\u00b115),… Read…","_links":{"self":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4627"}],"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=4627"}],"version-history":[{"count":4,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4627\/revisions"}],"predecessor-version":[{"id":4664,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4627\/revisions\/4664"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media\/4631"}],"wp:attachment":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media?parent=4627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/categories?post=4627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/tags?post=4627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}

{"id":4627,"date":"2026-11-02T06:29:22","date_gmt":"2026-11-02T06:29:22","guid":{"rendered":"https:\/\/www.chess.lumn.eu\/wordpress\/?p=4627"},"modified":"2026-11-03T03:50:56","modified_gmt":"2026-11-03T03:50:56","slug":"meta-moteur-pleiades-uci","status":"publish","type":"post","link":"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/02\/meta-moteur-pleiades-uci\/","title":{"rendered":"Meta moteur ‘Shahmatic Pl\u00e9iades-UCI’"},"content":{"rendered":"\n\n\n\n\n\nSept cerveaux valent-ils mieux que trois ?<\/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>Sept cerveaux valent-ils mieux que trois ?<\/h1>\n<p class=\"chapeau\">Apr\u00e8s Orion, le trio, voici Pl\u00e9iades : sept machines d’\u00e9checs des ann\u00e9es 1980-90, sept auteurs diff\u00e9rents, un arbitre Stockfish 18. R\u00e9unies, elles jouent trois classes au-dessus de la meilleure d’entre elles \u2014 et, \u00e0 l’occasion, sacrifient \u00e0 l’unanimit\u00e9.<\/p>\n<div class=\"stats\">\n <div class=\"stat\"><b>2921<\/b><span>cote Ordo (\u00b115), 151 parties<\/span><\/div>\n <div class=\"stat\"><b>+774<\/b><span>au-dessus de la moyenne des 7 membres (2147)<\/span><\/div>\n <div class=\"stat\"><b>2722<\/b><span>cote moyenne des adversaires affront\u00e9s<\/span><\/div>\n <div class=\"stat\"><b>71,2 %<\/b><span>score sur les trois gauntlets<\/span><\/div>\n<\/div>\n<h2><span class=\"lead-num\">1.<\/span>D’Orion \u00e0 Pl\u00e9iades<\/h2>\n<p>Orion, le trio <em>(Novag Forte A + Mephisto MM IV + Fidelity Designer 2100)<\/em>, avait r\u00e9pondu \u00e0 la question \u00ab trois cerveaux valent-ils mieux qu’un ? \u00bb : mesur\u00e9 en gauntlet contre le plateau 2050-2350 du laboratoire, il est aujourd’hui cot\u00e9 <strong>2316<\/strong> par Ordo (210 parties), soit <strong>+528<\/strong> au-dessus de la moyenne de ses trois membres (1788). La force d’un m\u00e9ta-moteur ne vient pas de la puissance de ses t\u00eates, mais de la <em>diversit\u00e9 de leurs erreurs<\/em> : quand deux programmes de deux auteurs se trompent, ils se trompent rarement de la m\u00eame fa\u00e7on, et l’arbitre n’a qu’\u00e0 retenir le coup qui survit \u00e0 tous les regards.<\/p>\n<p>Si trois t\u00eates gagnent 528 points, qu’en est-il de sept ? Pl\u00e9iades reprend la recette avec <strong>sept auteurs<\/strong> et une tranche plus haute (membres de 2098 \u00e0 2188, moyenne 2147). La r\u00e8gle d’Orion \u2014 auteurs tous diff\u00e9rents \u2014 est tenue ; l’\u00e9cart interne de 90 points d\u00e9passe la limite habituelle de 75, assum\u00e9.<\/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>MChess 1.71 (486DX 33 MHz)<\/td><td>Marty Hirsch<\/td><td class=\"num\">2188<\/td><\/tr>\n<tr><td>Saitek RISC 2500 v1.04<\/td><td>Johan de Koning<\/td><td class=\"num\">2181<\/td><\/tr>\n<tr><td>Fritz 2 (486DX 33 MHz)<\/td><td>Frans Morsch<\/td><td class=\"num\">2170<\/td><\/tr>\n<tr><td>Gideon 3.1 ChessMachine (14 MHz)<\/td><td>Ed Schr\u00f6der<\/td><td class=\"num\">2150<\/td><\/tr>\n<tr><td>Fidelity Elite Avantgarde V9<\/td><td>Dan & Kathe Spracklen<\/td><td class=\"num\">2125<\/td><\/tr>\n<tr><td>Mephisto Berlin 68000 v0.03<\/td><td>Richard Lang<\/td><td class=\"num\">2118<\/td><\/tr>\n<tr><td>Novag Sapphire<\/td><td>David Kittinger<\/td><td class=\"num\">2098<\/td><\/tr>\n<tr class=\"tot\"><td>Moyenne<\/td><td>sept auteurs<\/td><td class=\"num\">2147<\/td><\/tr>\n<\/tbody>\n<\/table>\n<h2><span class=\"lead-num\">2.<\/span>Comment \u00e7a marche<\/h2>\n<p>\u00c0 chaque coup, les sept machines re\u00e7oivent la position et r\u00e9fl\u00e9chissent <strong>en parall\u00e8le<\/strong>, environ 15 secondes chacune. Elles rendent sept coups (parfois le m\u00eame). <strong>Stockfish 18<\/strong>, un seul fil, environ une seconde, re\u00e7oit l’ensemble des coups propos\u00e9s <em>(go searchmoves)<\/em> et retient le meilleur. Quand les sept tombent d’accord, l’arbitre n’est <em>pas consult\u00e9<\/em> : l’unanimit\u00e9 se suffit \u00e0 elle-m\u00eame.<\/p>\n<p>La difficult\u00e9 n’est pas le choix : c’est de faire jouer ensemble sept machines r\u00e9elles dont aucune n’a d’entr\u00e9e UCI. Chacune passe par un \u00ab pont \u00bb qui la pilote, et le vrai probl\u00e8me surgit quand le coup d’un membre <em>n’est pas<\/em> retenu : il faut remettre la machine sur la position r\u00e9ellement jou\u00e9e.<\/p>\n<div class=\"callout\">\n<b>Trois ponts, trois fa\u00e7ons de rattraper un membre d\u00e9savou\u00e9.<\/b><br>\n\u2022 <b>Cartes CB-Emu<\/b> (RISC 2500, Elite V9, Berlin 68000, Sapphire), \u00e9mul\u00e9es sous MAME : la partie est <em>rejou\u00e9e<\/em> en mode \u00e9dition \u2014 gratuit, mesur\u00e9 sur des milliers de rejeux.<br>\n\u2022 <b>Relais DOS<\/b> sur 486 \u00e9mul\u00e9 (MChess, Fritz 2) : la machine <em>reprend son demi-coup<\/em> puis saisit le coup retenu, au lieu de tout retaper.<br>\n\u2022 <b>Carte ChessMachine<\/b> (Gideon) : elle re\u00e7oit chaque coup de toute fa\u00e7on, un d\u00e9saveu ne lui co\u00fbte rien.<br>\nR\u00e8gle absolue : <b>jamais de diagramme (FEN) en cours de partie<\/b> \u2014 les machines d\u00e9di\u00e9es d\u00e9duisent les droits de roque du placement et roqueraient ill\u00e9galement. On leur rejoue les coups, jamais une position.\n<\/div>\n<h2><span class=\"lead-num\">3.<\/span>Les chiffres : trois gauntlets<\/h2>\n<p>Pl\u00e9iades a disput\u00e9 trois gauntlets contre des plateaux d’adversaires de plus en plus relev\u00e9s. Les performances ci-dessous sont calcul\u00e9es sur les <strong>cotes de la liste maison<\/strong> (chess.lumn.eu). Le classement Ordo, qui p\u00e8se toutes les parties ensemble, donne depuis <strong>2921 \u00b1 15<\/strong> (151 parties) : \u00e0 5 points du chiffre pool\u00e9.<\/p>\n<table>\n<thead><tr><th>Gauntlet<\/th><th class=\"num\">Score<\/th><th class=\"num\">%<\/th><th class=\"num\">Adv. moyen<\/th><th class=\"num\">Performance<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Plateau 2350<\/td><td class=\"num\">13 \/ 14<\/td><td class=\"num\">92,9<\/td><td class=\"num\">2374<\/td><td class=\"num\">2827 \u00b1 181<\/td><\/tr>\n<tr><td>Plateau 2650<\/td><td class=\"num\">73 \/ 90<\/td><td class=\"num\">81,1<\/td><td class=\"num\">2660<\/td><td class=\"num\">2930 \u00b1 48<\/td><\/tr>\n<tr><td>Plateau 2950<\/td><td class=\"num\">19,5 \/ 45<\/td><td class=\"num\">43,3<\/td><td class=\"num\">2954<\/td><td class=\"num\">2906 \u00b1 53<\/td><\/tr>\n<tr class=\"tot\"><td>Pool\u00e9<\/td><td class=\"num\">105,5 \/ 149<\/td><td class=\"num\">70,8<\/td><td class=\"num\">2722<\/td><td class=\"num\">2916 \u00b1 35<\/td><\/tr>\n<tr class=\"tot\"><td>Ordo (2 nov. 2026)<\/td><td class=\"num\">107,5 \/ 151<\/td><td class=\"num\">71,2<\/td><td class=\"num\">\u2014<\/td><td class=\"num\">2921 \u00b1 15<\/td><\/tr>\n<\/tbody>\n<\/table>\n<p>Les trois estimations convergent autour de 2900-2930, sauf le plateau 2350 \u2014 trop faible et trop court (14 parties, \u00b1181) pour contraindre quoi que ce soit. Le chiffre pool\u00e9 est port\u00e9 par les deux plateaux hauts.<\/p>\n<div class=\"callout\">\n<b>Pl\u00e9iades vs Orion.<\/b> Au classement Ordo, Orion est cot\u00e9 2316 (+528 sur ses membres) ; Pl\u00e9iades <b>2921 (+774 sur ses membres)<\/b>. Quatre t\u00eates de plus, un gain sup\u00e9rieur \u2014 et contre une opposition bien plus forte (2722 de moyenne contre 2214). \u00c0 temp\u00e9rer : les deux n’ont pas affront\u00e9 le m\u00eame plateau, et Pl\u00e9iades partait d\u00e9j\u00e0 de membres plus forts (2147 contre 1788). Ordo a tranch\u00e9 : <b>2921 \u00b1 15<\/b>, \u00e0 5 points de l’estimation par gauntlets (2916).\n<\/div>\n<h2><span class=\"lead-num\">4.<\/span>La partie la plus spectaculaire<\/h2>\n<p>Gauntlet du plateau 2650, 29 octobre. Pl\u00e9iades (Blancs) contre <strong>Yace Paderborn, cot\u00e9 2726<\/strong> \u2014 pr\u00e8s de 600 points au-dessus de la moyenne de ses membres. Sicilienne Najdorf, \u00e9gale jusqu’au 25<sup>e<\/sup> coup. Puis, d’un seul \u00e9lan, les sept machines donnent l’\u00e9change.<\/p>\n<figure><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" viewBox=\"0 0 390 390\" width=\"380\" height=\"380\"><desc><pre>r . . . k . . r\n. . R . b . p .\np . . . . . . .\nq . p P p . . .\n. . . . P . . .\n. B . . B . . p\nP . . . . . . P\n. . . Q . . 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xlink:href=\"#black-king\" transform=\"translate(195, 15)\" \/><use href=\"#black-rook\" xlink:href=\"#black-rook\" transform=\"translate(330, 15)\" \/><\/svg><figcaption><b>Apr\u00e8s 25\u2026Cc5 \u2014 26.Txc5 !<\/b> Les sept t\u00eates, \u00e0 l’unanimit\u00e9, donnent la Tour pour le Cavalier ; l’arbitre n’est m\u00eame pas consult\u00e9. Le pion d5, lui, va devenir une force que Yace sous-estime.<\/figcaption><\/figure>\n<p>La suite tient du coll\u00e8ge bien r\u00e9gl\u00e9. Six t\u00eates poussent le pion pass\u00e9 27.d6 ; au <strong>28.Fe6<\/strong>, la majorit\u00e9 veut reprendre le pion, mais l’arbitre <em>\u00e9carte le vote<\/em> et retient l’infiltration du Fou \u2014 Pl\u00e9iades n’est pas une d\u00e9mocratie, c’est un coll\u00e8ge avec un juge. 29.d7+ revient \u00e0 l’unanimit\u00e9. Pendant une quinzaine de coups, Yace \u2014 moteur des ann\u00e9es 2000 \u2014 se croit gagnant de +5, puis son \u00e9valuation s’effondre. Plus loin, c’est le Gideon 3.1, le plus pessimiste des sept, qui trouve seul les meilleurs coups (six fois dans la partie), et le RISC 2500 qui voit seul le mat forc\u00e9. Mat au 60<sup>e<\/sup>.<\/p>\n<div class=\"callout\">\n<b>\u00c0 lire \u00e0 part.<\/b> La partie est comment\u00e9e coup par coup \u2014 l’\u00e9valuation annonc\u00e9e par chacune des sept machines, le contr\u00f4le Stockfish de chaque proposition, et un \u00e9chiquier rejouable \u2014 dans l’article compagnon \u00ab <b>Pl\u00e9iades \u2013 Yace Paderborn<\/b> \u00bb. Sur 50 coups hors livre : 10 unanimes, 40 tranch\u00e9s par l’arbitre, et <b>21 gaffes de membres \u00e9cart\u00e9es<\/b>.\n<\/div>\n<h2><span class=\"lead-num\">5.<\/span>Pl\u00e9iadesRT : jouer en temps r\u00e9el, \u00e0 l’horloge de n’importe quelle interface<\/h2>\n<p>En gauntlet, Pl\u00e9iades peut se permettre de rejouer toute la partie \u00e0 chaque membre d\u00e9savou\u00e9 : l’interface encaisse. Mais pour en faire un moteur UCI <em>jouable<\/em> dans n’importe quelle interface \u2014 Banksia, cutechess \u2014 qui lui impose <strong>sa<\/strong> pendule, il fallait que Pl\u00e9iades tienne r\u00e9ellement ~15 secondes par coup, rejeu compris. C’est Pl\u00e9iadesRT. Les mesures prises :<\/p>\n<h3>L’instantan\u00e9 remplace le rejeu<\/h3>\n<p>Au lieu de rejouer la partie depuis le d\u00e9but, chaque carte CB-Emu prend un <strong>instantan\u00e9 de l’\u00e9tat machine<\/strong> (sauvegarde MAME programm\u00e9e \u00e0 la trame, avec notification apr\u00e8s rechargement) et y revient. Co\u00fbt du retour : <strong>0,06 s<\/strong> au lieu de plusieurs secondes de rejeu qui enflent avec la partie. La variante en m\u00e9moire <em>(buffer_save)<\/em> a \u00e9t\u00e9 \u00e9cart\u00e9e : cass\u00e9e par les timers anonymes de MAME, elle faisait d\u00e9river l’horloge interne.<\/p>\n<h3>Soit tous passent, soit aucun<\/h3>\n<p>Les quatre cartes CB-Emu (Elite V9, RISC 2500, Berlin 68000, Sapphire) ont \u00e9t\u00e9 valid\u00e9es une \u00e0 une : d\u00e9synchronisation puis trois demi-coups en mode \u00e9dition, chacune devait repartir juste. Au passage, portage du greffon vers MAME 0.275 (la matrice de diodes du V9 \u00e9tait en miroir, les bits de touches invers\u00e9s).<\/p>\n<h3>Temps adaptatif et pr\u00e9-positionnement<\/h3>\n<p>Chaque membre re\u00e7oit une cible de 15 s, un plancher de 3 s, moins un surco\u00fbt propre \u00e0 son chemin de resynchronisation (instantan\u00e9, pr\u00e9-pose, liste, rejeu), liss\u00e9 d’un coup \u00e0 l’autre, pour viser <strong>~15 s r\u00e9elles au total<\/strong>. Mieux : pendant que l’adversaire r\u00e9fl\u00e9chit, un membre peut <strong>pr\u00e9-positionner<\/strong> les demi-coups d\u00e9j\u00e0 connus (resync + pose \u00e0 l’avance), de sorte qu’\u00e0 son tour il n’ait plus qu’\u00e0 calculer. Le Sapphire, muet apr\u00e8s une pr\u00e9-pose, en est exclu et resynchronise au dernier moment.<\/p>\n<h3>Compatible avec l’horloge Banksia<\/h3>\n<p>La cible de temps est <strong>born\u00e9e par la pendule re\u00e7ue<\/strong> au <em>go<\/em> (wtime\/btime\/movestogo, avec une r\u00e9serve de ~10 s) : Pl\u00e9iadesRT respecte la cadence que lui impose l’interface au lieu d’imposer ses 15 s. Un plafond de marge au premier coup (4\u00d7 puis 2\u00d7 la cible) \u00e9vite qu’une t\u00eate lente ne bloque la partie, et la nvram est remise \u00e0 z\u00e9ro au d\u00e9marrage \u2014 une partie mat\u00e9e y persistait et faisait refuser la suivante.<\/p>\n<div class=\"callout\">\n<b>Authentique, pas acc\u00e9l\u00e9r\u00e9.<\/b> Pendant sa r\u00e9flexion, chaque carte tourne \u00e0 la vitesse <b>nominale<\/b> du processeur d’\u00e9poque : en 13 s de calcul elle calcule exactement ce qu’aurait calcul\u00e9 la vraie machine en 13 s. Seule l’intendance \u2014 poser les pi\u00e8ces, lire le coup \u2014 tourne d\u00e9brid\u00e9e, et ne compte pas comme de la r\u00e9flexion. La force reproduite est celle de l’original, pas une version dop\u00e9e.\n<\/div>\n<h3>Le gauntlet : m\u00eame force, \u00e0 ~80 Elo pr\u00e8s<\/h3>\n<p>Pl\u00e9iadesRT a ensuite disput\u00e9 son propre gauntlet sur le plateau 2650, contre les <strong>neuf m\u00eames adversaires<\/strong> que la version de laboratoire \u2014 la comparaison la plus juste possible. R\u00e9sultat sur 99 parties : <strong>71,5 \/ 99 (72 %), performance 2838 \u00b1 40<\/strong>, contre <strong>2930<\/strong> pour la version gauntlet (qui rejoue toute la partie) sur le m\u00eame plateau. Le classement Ordo confirme l’ordre de grandeur : <strong>Pl\u00e9iadesRT 2839 \u00b1 18<\/strong> contre <strong>Pl\u00e9iades 2921 \u00b1 15<\/strong>. Le passage au temps r\u00e9el co\u00fbte donc de l’ordre de <strong>80 Elo<\/strong>.<\/p>\n<table>\n<thead><tr><th>Adversaire<\/th><th class=\"num\">Cote<\/th><th class=\"num\">Pl\u00e9iades (labo)<\/th><th class=\"num\">Pl\u00e9iadesRT<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Rebel 12 (P90)<\/td><td class=\"num\">2514<\/td><td class=\"num\">100 %<\/td><td class=\"num\">86 %<\/td><\/tr>\n<tr><td>Chess Genius 1 (P90)<\/td><td class=\"num\">2533<\/td><td class=\"num\">80 %<\/td><td class=\"num\">100 %<\/td><\/tr>\n<tr><td>Chess Genius 3 (P90)<\/td><td class=\"num\">2577<\/td><td class=\"num\">95 %<\/td><td class=\"num\">86 %<\/td><\/tr>\n<tr><td>Stockfish 11 68040<\/td><td class=\"num\">2610<\/td><td class=\"num\">90 %<\/td><td class=\"num\">82 %<\/td><\/tr>\n<tr><td>Rebel 6.0<\/td><td class=\"num\">2674<\/td><td class=\"num\">65 %<\/td><td class=\"num\">68 %<\/td><\/tr>\n<tr><td>Yace Paderborn<\/td><td class=\"num\">2726<\/td><td class=\"num\">90 %<\/td><td class=\"num\">77 %<\/td><\/tr>\n<tr><td>Nimzo 8<\/td><td class=\"num\">2757<\/td><td class=\"num\">85 %<\/td><td class=\"num\">45 %<\/td><\/tr>\n<tr><td>WildCat 8<\/td><td class=\"num\">2764<\/td><td class=\"num\">50 %<\/td><td class=\"num\">59 %<\/td><\/tr>\n<tr><td>Shredder 5.32<\/td><td class=\"num\">2781<\/td><td class=\"num\">75 %<\/td><td class=\"num\">45 %<\/td><\/tr>\n<tr class=\"tot\"><td>Performance<\/td><td class=\"num\">~2660<\/td><td class=\"num\">2930 \u00b1 48<\/td><td class=\"num\">2838 \u00b1 40<\/td><\/tr>\n<tr class=\"tot\"><td>Cote Ordo<\/td><td class=\"num\"><\/td><td class=\"num\">2921 \u00b1 15<\/td><td class=\"num\">2839 \u00b1 18<\/td><\/tr>\n<\/tbody>\n<\/table>\n<div class=\"callout\">\n<b>O\u00f9 se loge le co\u00fbt.<\/b> Les deux versions jouent <b>proprement<\/b> \u2014 z\u00e9ro incident, m\u00e9diane 15 s par coup de part et d’autre. L’\u00e9cart est <b>concentr\u00e9 sur les deux adversaires les plus forts<\/b>, Nimzo 8 (45 % contre 85 %) et Shredder 5.32 (45 % contre 75 %), et quasi nul ailleurs. C’est coh\u00e9rent avec la seule diff\u00e9rence structurelle : un membre dont la resynchro co\u00fbte cher r\u00e9fl\u00e9chit un peu moins que ses 15 s pleines, ce qui ne p\u00e8se que dans les parties serr\u00e9es contre le haut du plateau. Un prix mod\u00e9r\u00e9 pour un m\u00e9ta-moteur r\u00e9ellement jouable en temps r\u00e9el dans n’importe quelle interface.\n<\/div>\n<p class=\"note\">Essai de mise au point : partie gagn\u00e9e contre Fritz 2, m\u00e9diane 15,1 s par coup \u00e0 60\/900, z\u00e9ro incident. Cotes Ordo du 2 novembre 2026 : Pl\u00e9iades 2921, Pl\u00e9iadesRT 2839.<\/p>\n<footer>\n<h2>Notes<\/h2>\n<ul>\n<li>Performances calcul\u00e9es sur les cotes de la liste maison (chess.lumn.eu, \u00ab Performance elo, tournois maison \u00bb), par r\u00e9solution de R tel que la somme des scores attendus \u00e9gale le score r\u00e9alis\u00e9 ; \u00b1 = erreur-type (adversaires suppos\u00e9s exacts). Le classement Ordo du 2 novembre 2026 (toutes parties) donne Pl\u00e9iades 2921 \u00b1 15, Pl\u00e9iadesRT 2839 \u00b1 18, Orion 2316 \u00b1 11.<\/li>\n<li>149 parties cot\u00e9es sur 151 (deux parties contre un adversaire non cot\u00e9 \u00e9cart\u00e9es).<\/li>\n<li>Les \u00e9valuations des sept membres proviennent des journaux du m\u00e9ta-moteur de la partie cit\u00e9e (Pl\u00e9iades \u2013 Yace, 29\/10\/2026) ; valeurs en pions, du point de vue du membre.<\/li>\n<\/ul>\n<\/footer>\n<\/article>\n<\/body>\n<\/html>\n\n\n\n<title>Pl\u00e9iades \u2013 Yace Paderborn, partie comment\u00e9e<\/title>\n<meta name=\"viewport\" content=\"width=device-width, initial-scale=1, viewport-fit=cover\">\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link rel=\"stylesheet\" 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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<header>\n <div class=\"eyebrow\">Gauntlet de Pl\u00e9iades, adversaires cot\u00e9s ~2650 \u00b7 29 octobre 2026<\/div>\n <h1>Pl\u00e9iades \u2013 Yace Paderborn<\/h1>\n <div class=\"players\"><span>Pl\u00e9iades (m\u00e9ta-moteur)<b>Ordo 2921<\/b><\/span><span>Yace Paderborn<b>2726<\/b><\/span><span>1-0 en 60 coups<\/span><\/div>\n <p class=\"lede\">Sicilienne Najdorf. Pl\u00e9iades joue avec sept machines de sept auteurs : chacune r\u00e9fl\u00e9chit 15 secondes, et quand elles ne s’accordent pas, Stockfish 18 choisit en une seconde parmi leurs propositions. Ici les sept donnent l’\u00e9change d’un seul \u00e9lan ; puis, coup apr\u00e8s coup, c’est le plus pessimiste d’entre elles \u2014 le Gideon 3.1 \u2014 et le RISC 2500 qui trouvent seuls les coups d\u00e9cisifs, pendant qu’un moteur trois classes au-dessus se croit gagnant.<\/p>\n <div class=\"legend\"><span class=\"chip\"><i class=\"dot\" style=\"background:#3366cc\"><\/i>MChess 1.71 <b>Hirsch<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#cc3333\"><\/i>RISC 2500 <b>de Koning<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#d99400\"><\/i>Fritz 2 <b>Morsch<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#8e44ad\"><\/i>Gideon 3.1 <b>Schr\u00f6der<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#e67e22\"><\/i>Elite V9 <b>Spracklen<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#17a2b8\"><\/i>Berlin 68000 <b>Lang<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:#c0397f\"><\/i>Sapphire <b>Kittinger<\/b><\/span><span class=\"chip\"><i class=\"dot\" style=\"background:var(--played)\"><\/i>coup jou\u00e9<\/span><\/div>\n<\/header>\n\n<div class=\"stats\" aria-label=\"Chiffres de la partie\">\n <div class=\"stat\"><span class=\"n\">50<\/span><span class=\"l\">coups de Pl\u00e9iades apr\u00e8s le livre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">10 \/ 40<\/span><span class=\"l\">unanimes \/ tranch\u00e9s par l’arbitre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">Gideon 3.1 6 \u00b7 RISC 2500 4 \u00b7 Sapphire 2 \u00b7 MChess 1.71 2 \u00b7 Berlin 68000 1<\/span><span class=\"l\">coups retenus venus d’un seul membre<\/span><\/div>\n <div class=\"stat\"><span class=\"n\">21<\/span><span class=\"l\">gaffes de membres \u00e9cart\u00e9es (\u2265 1,5 pion selon Stockfish)<\/span><\/div>\n<\/div>\n\n<section>\n <h2>L’\u00e9valuation au fil de la partie<\/h2>\n <div class=\"graph\"><svg id=\"graph\" viewBox=\"0 0 1000 200\" role=\"img\" aria-label=\"\u00c9valuation Stockfish du point de vue de Pl\u00e9iades, coup par coup\"><\/svg><\/div>\n <p class=\"small\">\u00c9valuation Stockfish 16 du point de vue de Pl\u00e9iades, apr\u00e8s chaque coup jou\u00e9 (plafonn\u00e9e \u00e0 \u00b110 ; au-del\u00e0, c’est le mat).<\/p>\n<\/section>\n\n<section>\n <h2>Les moments cl\u00e9s<\/h2>\n <p class=\"small\">Chaque diagramme montre la position avant le coup. Fl\u00e8ches : les propositions des membres (couleur du membre si un seul la propose, gris si plusieurs), le coup jou\u00e9 en vert. Le tableau donne, pour chaque t\u00eate, son coup, son \u00e9valuation affich\u00e9e et le contr\u00f4le Stockfish.<\/p>\n <div class=\"moments\" id=\"moments\"><\/div>\n<\/section>\n\n<section>\n <h2>Rejouer la partie<\/h2>\n <div class=\"replay\">\n <div class=\"board-col\">\n <div id=\"board\"><\/div>\n <div class=\"controls\">\n <button id=\"b-start\" type=\"button\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n <button id=\"b-prev\" type=\"button\" aria-label=\"Pr\u00e9c\u00e9dent\">\u25c0<\/button>\n <button id=\"b-next\" type=\"button\" aria-label=\"Suivant\">\u25b6<\/button>\n <button id=\"b-end\" type=\"button\" aria-label=\"Fin\">\u23ef<\/button>\n <span class=\"cur\" id=\"cur\"><\/span>\n <\/div>\n <div class=\"comment\" id=\"comment\" aria-live=\"polite\"><\/div>\n <\/div>\n <div class=\"movelist\" id=\"movelist\"><\/div>\n <\/div>\n <p class=\"small\">Fl\u00e8ches \u2190 \u2192 du clavier pour avancer et reculer.<\/p>\n<\/section>\n\n<footer>\n <p>Sources : PGN du gauntlet (cutechess) et journal de Pl\u00e9iades, qui note pour chaque coup la proposition et l’\u00e9valuation annonc\u00e9e par chacune des sept machines, ainsi que la d\u00e9cision de l’arbitre. \u00c9valuations de contr\u00f4le : Stockfish 16, ~0,2 s par position, indicatives.<\/p>\n <p>Les \u00e9valuations \u00ab machine \u00bb sont celles annonc\u00e9es par chaque programme d’\u00e9poque : leurs coups sont fiables, leurs chiffres approximatifs. Livre jusqu’au 10<sup>e<\/sup> coup. Cadences : Pl\u00e9iades 60\/6000, Yace 60\/900. 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0 1\"}, MEM=[{\"k\": \"MChess\", \"nom\": \"MChess 1.71\", \"auteur\": \"Hirsch\", \"cote\": 2188, \"col\": \"#3366cc\"}, {\"k\": \"Saitek\", \"nom\": \"RISC 2500\", \"auteur\": \"de Koning\", \"cote\": 2181, \"col\": \"#cc3333\"}, {\"k\": \"Fritz\", \"nom\": \"Fritz 2\", \"auteur\": \"Morsch\", \"cote\": 2170, \"col\": \"#d99400\"}, {\"k\": \"Gideon\", \"nom\": \"Gideon 3.1\", \"auteur\": \"Schr\u00f6der\", \"cote\": 2150, \"col\": \"#8e44ad\"}, {\"k\": \"Fidelity\", \"nom\": \"Elite V9\", \"auteur\": \"Spracklen\", \"cote\": 2125, \"col\": \"#e67e22\"}, {\"k\": \"Mephisto\", \"nom\": \"Berlin 68000\", \"auteur\": \"Lang\", \"cote\": 2118, \"col\": \"#17a2b8\"}, {\"k\": \"Novag\", \"nom\": \"Sapphire\", \"auteur\": \"Kittinger\", \"cote\": 2098, \"col\": \"#c0397f\"}], MOM=[[9, \"Le pessimiste a raison\", \"Six t\u00eates reprennent en d2. Le Gideon 3.1 \u2014 le plus pessimiste des sept, il sous-\u00e9value tout \u2014 joue seul <b>19.Fxc4<\/b>, reprendre de la bonne pi\u00e8ce. L'arbitre le suit contre les six autres.\"], [15, \"Une gaffe \u00e0 3,7 pions \u00e9cart\u00e9e\", \"Le RISC 2500 et l'Elite V9 proposent l'\u00e9chec <b>25\u2026Tc8+<\/b>, qui rend tout l'avantage (\u22121,97). Les cinq autres reprennent simplement en e4 ; l'arbitre valide. Deux t\u00eates voulaient jeter la partie.\"], [16, \"Les sept sacrifient d'un seul \u00e9lan\", \"<b>26.Txc5 !<\/b> La Tour pour le Cavalier, \u00e0 l'unanimit\u00e9 : aucune t\u00eate n'a flanch\u00e9, l'arbitre n'est pas consult\u00e9. Le pion d5 va devenir une force que l'adversaire sous-estime.\"], [18, \"L'arbitre \u00e9carte la majorit\u00e9\", \"Quatre t\u00eates reprennent le pion (Fxc5, +3,88) ; seuls MChess et Gideon infiltrent le Fou en <b>28.Fe6<\/b> (+6,18). L'arbitre contredit le vote \u2014 deux pions et demi de mieux.\"], [43, \"Le RISC 2500 voit seul le mat\", \"<b>53.Fd3 !<\/b> Le RISC 2500 est la seule t\u00eate \u00e0 voir le mat forc\u00e9 ; les quatre autres se contentent de +14. Le Fou enferme le Roi noir sur la colonne g.\"], [50, \"Mat du Fou\u2026 non, de la Dame\", \"Deux mats au choix : le RISC 2500 annonce <b>60.De4#<\/b>, le Gideon <b>60.Df3#<\/b>. L'arbitre joue celui du Gideon. Deux Dames promues referment le filet.\"]];\nconst COL={}; MEM.forEach(m=>COL[m.k]=m.col); const PLAYED=\"#0b7a52\";\nconst NAM={}; MEM.forEach(m=>NAM[m.k]=m.nom);\nfunction fr(s){return (s||\"\").replace(\/[KQRBN]\/g,c=>({K:\"R\",Q:\"D\",R:\"T\",B:\"F\",N:\"C\"}[c]));}\nfunction fmt(v){if(v===null||v===undefined)return\"\u2013\";if(Math.abs(v)>=90)return v>0?\"#\":\"\u2212#\";const s=Math.abs(v).toFixed(2).replace(\".\",\",\");return (v>0?\"+\":v<0?\"\u2212\":\"\")+s;}\nfunction cls(v){return v===null||v===undefined?\"\":v>0.15?\"pos\":v<-0.15?\"neg\":\"\";}\n\/\/ --- echiquier depuis FEN ---\nconst GLYbw={\"P\":\"white-pawn\",\"N\":\"white-knight\",\"B\":\"white-bishop\",\"R\":\"white-rook\",\"Q\":\"white-queen\",\"K\":\"white-king\",\n \"p\":\"black-pawn\",\"n\":\"black-knight\",\"b\":\"black-bishop\",\"r\":\"black-rook\",\"q\":\"black-queen\",\"k\":\"black-king\"};\nfunction sqXY(s){return [(s.charCodeAt(0)-97)*45+22.5,(8-(+s[1]))*45+22.5];}\nfunction boardSVG(fen,arrows,last){\n let s='<svg class=\"bd\" viewBox=\"-2 -2 364 364\">';\n const rows=fen.split(\" \")[0].split(\"\/\");\n for(let r=0;r<8;r++)for(let c=0;c<8;c++){const lt=(r+c)%2===0;\n s+='<rect x=\"'+(c*45)+'\" y=\"'+(r*45)+'\" width=\"45\" height=\"45\" fill=\"'+(lt?\"var(--sq-light)\":\"var(--sq-dark)\")+'\"\/>';}\n if(last){[\"from\",\"to\"].forEach(k=>{const[x,y]=sqXY(last[k]);s+='<rect x=\"'+(x-22.5)+'\" y=\"'+(y-22.5)+'\" width=\"45\" height=\"45\" fill=\"'+PLAYED+'\" opacity=\"0.18\"\/>';});}\n for(let r=0;r<8;r++){let c=0;for(const ch of rows[r]){if(\/\\d\/.test(ch)){c+=+ch;}else{\n const g=GLYbw[ch];if(g)s+='<use href=\"#'+g+'\" x=\"'+(c*45)+'\" y=\"'+(r*45)+'\"\/>';c++;}}}\n (arrows||[]).forEach(a=>{const[x1,y1]=sqXY(a.from),[x2,y2]=sqXY(a.to);\n const dx=x2-x1,dy=y2-y1,L=Math.hypot(dx,dy),ux=dx\/L,uy=dy\/L;const x2b=x2-ux*16,y2b=y2-uy*16;\n s+='<line x1=\"'+x1+'\" y1=\"'+y1+'\" x2=\"'+x2b+'\" y2=\"'+y2b+'\" stroke=\"'+a.col+'\" stroke-width=\"'+(a.played?6:3.5)+'\" opacity=\"'+(a.played?0.95:0.7)+'\" marker-end=\"url(#ah-'+a.id+')\"\/>';});\n s+='<\/svg>';return s;\n}\n\/\/ marqueurs de fl\u00e8ches (un par couleur utilis\u00e9e)\n(function(){let defs=document.querySelector(\"#arrowdefs\");if(!defs){defs=document.createElementNS(\"http:\/\/www.w3.org\/2000\/svg\",\"svg\");defs.id=\"arrowdefs\";defs.setAttribute(\"width\",\"0\");defs.setAttribute(\"height\",\"0\");defs.style.position=\"absolute\";document.body.appendChild(defs);}\n const cols={played:PLAYED,multi:\"#8a8f86\"};MEM.forEach(m=>cols[m.k]=m.col);\n let h='<defs>';for(const id in cols){h+='<marker id=\"ah-'+id+'\" viewBox=\"0 0 10 10\" refX=\"7\" refY=\"5\" markerWidth=\"4\" markerHeight=\"4\" orient=\"auto\"><path d=\"M0,0 L10,5 L0,10 z\" fill=\"'+cols[id]+'\"\/><\/marker>';}h+='<\/defs>';defs.innerHTML=h;})();\nfunction arrowsFor(o){const arr=[];const chosen=o.chosen;\n for(const u in o.distinct){const d=o.distinct[u];const mult=d.members.length>1;const played=(u===chosen);\n arr.push({from:u.slice(0,2),to:u.slice(2,4),played:played,\n col:played?PLAYED:(mult?\"#8a8f86\":COL[d.members[0]]),id:played?\"played\":(mult?\"multi\":d.members[0])});}\n \/\/ le coup jou\u00e9 en dernier (au-dessus)\n arr.sort((a,b)=>(a.played?1:0)-(b.played?1:0));return arr;\n}\nfunction propsTable(o){\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 MEM.forEach(m=>{const pr=o.props[m.k];if(!pr)return;const u=pr[0];const mach=pr[1];const d=o.distinct[u]||{};\n const sf=d.ev;const chosen=(u===o.chosen);\n const mv=d.san?fr(d.san):u;\n let machn=mach.replace(\"+M\",\"#\").replace(\"-M\",\"\u2212#\").replace(\"+\",\"+\").replace(\"-\",\"\u2212\").replace(\".\",\",\");\n h+='<tr class=\"'+(chosen?\"chosen\":\"\")+'\"><td><span class=\"mdot\" style=\"background:'+m.col+'\"><\/span>'+m.nom+'<\/td><td>'+mv+'<\/td><td class=\"num\">'+machn+'<\/td><td class=\"num '+cls(sf)+'\">'+fmt(sf)+'<\/td><\/tr>';});\n h+='<\/tbody><\/table>';return h;\n}\n\/\/ --- moments ---\nconst outByN={};D.out.forEach(o=>outByN[o.n]=o);\nconst momDiv=document.getElementById(\"moments\");\nMOM.forEach(([n,titre,comm])=>{const o=outByN[n];if(!o)return;\n const last={from:o.uci.slice(0,2),to:o.uci.slice(2,4)};\n const tag=(o.typ===\"unanime\"?\"Unanime\":\"Arbitr\u00e9\")+(o.arb&&o.arb.indexOf(\"consult\")<0?\" \u00b7 Stockfish \"+o.arb.replace(\".\",\",\"):\"\");\n const div=document.createElement(\"div\");div.className=\"moment\";\n div.innerHTML='<div class=\"bd-wrap\">'+boardSVG(o.fen_before,arrowsFor(o),null)+'<\/div>'+\n '<div class=\"txt\"><h3>'+o.move_no+'. '+fr(o.san)+' \u2014 '+titre+'<\/h3><p class=\"tag\">'+tag+'<\/p><p>'+comm+'<\/p>'+propsTable(o)+'<\/div>';\n momDiv.appendChild(div);});\n\/\/ --- graphe eval ---\n(function(){const svg=document.getElementById(\"graph\");const W=1000,H=200,P=28;\n const xs=D.curve.map(p=>p.x),ys=D.curve.map(p=>Math.max(-10,Math.min(10,p.y)));\n const x0=Math.min(...xs),x1=Math.max(...xs);\n const X=v=>P+(v-x0)\/(x1-x0)*(W-2*P), Y=v=>H\/2-(v\/10)*(H\/2-P);\n let h='';\n h+='<rect x=\"0\" y=\"0\" width=\"'+W+'\" height=\"'+(H\/2)+'\" fill=\"rgba(11,122,82,0.05)\"\/>';\n h+='<rect x=\"0\" y=\"'+(H\/2)+'\" width=\"'+W+'\" height=\"'+(H\/2)+'\" fill=\"rgba(177,54,54,0.05)\"\/>';\n [ -10,-5,0,5,10].forEach(v=>{h+='<line x1=\"'+P+'\" y1=\"'+Y(v)+'\" x2=\"'+(W-P)+'\" y2=\"'+Y(v)+'\" stroke=\"var(--line)\" stroke-width=\"1\"\/>';h+='<text x=\"2\" y=\"'+(Y(v)+3)+'\">'+(v>0?\"+\":\"\")+v+'<\/text>';});\n let dpath=\"\";D.curve.forEach((p,i)=>{dpath+=(i?\"L\":\"M\")+X(p.x)+\",\"+Y(Math.max(-10,Math.min(10,p.y)));});\n h+='<path d=\"'+dpath+'\" fill=\"none\" stroke=\"'+PLAYED+'\" stroke-width=\"2.5\"\/>';\n D.curve.forEach(p=>{h+='<circle cx=\"'+X(p.x)+'\" cy=\"'+Y(Math.max(-10,Math.min(10,p.y)))+'\" r=\"2.6\" fill=\"'+PLAYED+'\"\/>';});\n [11,20,26,30,40,50,60].forEach(v=>{if(v>=x0&&v<=x1)h+='<text x=\"'+X(v)+'\" y=\"'+(H-6)+'\" text-anchor=\"middle\">'+v+'<\/text>';});\n svg.innerHTML=h;})();\n\/\/ --- rejeu ---\nconst R=D.replay;let cur=-1;\nconst bd=document.getElementById(\"board\"),cm=document.getElementById(\"comment\"),curEl=document.getElementById(\"cur\");\nconst ml=document.getElementById(\"movelist\");const btns=[];\n(function(){let h=\"\";for(let i=0;i<R.length;i+=2){const no=i\/2+1;\n h+='<div class=\"no\">'+no+'.<\/div>';\n h+='<button class=\"mv\" data-i=\"'+i+'\">'+cell(i)+'<\/button>';\n h+=(i+1<R.length)?'<button class=\"mv\" data-i=\"'+(i+1)+'\">'+cell(i+1)+'<\/button>':'<div><\/div>';}\n ml.innerHTML=h;ml.querySelectorAll(\".mv\").forEach(b=>{btns[+b.dataset.i]=b;b.onclick=()=>go(+b.dataset.i);});})();\nfunction cell(i){const r=R[i];const key=r.n&&MOM.some(m=>m[0]===r.n);return '<span class=\"mk\" style=\"background:'+(r.n?PLAYED:\"transparent\")+'\"><\/span>'+(key?'<span class=\"key\">'+fr(r.san)+'<\/span>':fr(r.san));}\nfunction moveLabel(i){const n=Math.floor(i\/2)+1;return i%2===0?n+\".\":n+\"\u2026\";}\nfunction go(i){cur=Math.max(-1,Math.min(R.length-1,i));render();}\nfunction render(){\n const fen=cur<0?D.start_fen:R[cur].fen;\n let last=null;if(cur>=0){const u=uciOf(cur);if(u)last={from:u.slice(0,2),to:u.slice(2,4)};}\n bd.innerHTML=boardSVG(fen,[],last);\n curEl.textContent=cur<0?\"position de d\u00e9part\":(moveLabel(cur)+\" \"+fr(R[cur].san));\n btns.forEach((b,i)=>b&&b.classList.toggle(\"on\",i===cur));\n if(cur>=0&&btns[cur])btns[cur].scrollIntoView({block:\"nearest\"});\n \/\/ commentaire si moment\n let c=\"\";if(cur>=0&&R[cur].n){const mm=MOM.find(m=>m[0]===R[cur].n);if(mm)c='<h3>'+mm[1]+'<\/h3><p>'+mm[2]+'<\/p>';\n else{const o=outByN[R[cur].n];if(o){const pr=o.distinct[o.chosen];const prs=pr?pr.members.map(k=>NAM[k]).join(\", \"):\"\";\n c='<p class=\"tag\">'+(o.typ===\"unanime\"?\"Unanime\":\"Arbitr\u00e9\")+'<\/p><p>Retenu : '+fr(R[cur].san)+' \u2014 propos\u00e9 par '+prs+'.<\/p>';}}}\n cm.innerHTML=c||'<p class=\"small\">Cliquez un coup ou utilisez les fl\u00e8ches.<\/p>';\n}\n\/\/ reconstruire l'uci du coup i : on ne l'a pas stock\u00e9, on le deduit via FEN precedente -> trop lourd ; on surligne via san only\nfunction uciOf(i){const o=R[i].n?outByN[R[i].n]:null;return o?o.uci:null;}\ndocument.getElementById(\"b-start\").onclick=()=>go(-1);\ndocument.getElementById(\"b-prev\").onclick=()=>go(cur-1);\ndocument.getElementById(\"b-next\").onclick=()=>go(cur+1);\ndocument.getElementById(\"b-end\").onclick=()=>go(R.length-1);\ndocument.addEventListener(\"keydown\",e=>{if(e.key===\"ArrowLeft\"){go(cur-1);e.preventDefault();}if(e.key===\"ArrowRight\"){go(cur+1);e.preventDefault();}});\ngo(-1);\n<\/script>\n<\/article>\n","protected":false},"excerpt":{"rendered":"<p>Sept cerveaux valent-ils mieux que trois ? Laboratoire \u00b7 m\u00e9ta-moteur Sept cerveaux valent-ils mieux que trois ? Apr\u00e8s Orion, le trio, voici Pl\u00e9iades : sept machines d’\u00e9checs des ann\u00e9es 1980-90, sept auteurs diff\u00e9rents, un arbitre Stockfish 18. R\u00e9unies, elles jouent trois classes au-dessus de la meilleure d’entre elles \u2014 et, \u00e0 l’occasion, sacrifient \u00e0 l’unanimit\u00e9. 2921cote Ordo (\u00b115),… <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/02\/meta-moteur-pleiades-uci\/\" class=\"\" rel=\"bookmark\">Read More »<span class=\"screen-reader-text\">Meta moteur ‘Shahmatic Pl\u00e9iades-UCI’<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":4631,"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":[53,34],"tags":[],"rttpg_featured_image_url":{"full":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"landscape":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"portraits":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"thumbnail":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-150x150.png",150,150,true],"medium":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-300x300.png",300,300,true],"large":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-1024x1024.png",1024,1024,true],"1536x1536":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"2048x2048":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1.png",1200,1200,false],"neve-blog":["https:\/\/www.chess.lumn.eu\/wordpress\/wp-content\/uploads\/2026\/11\/pleiades-une-1x1-1-930x620.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\/blog\/\" rel=\"category tag\">Blog<\/a> <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/category\/test\/\" rel=\"category tag\">Test<\/a>","rttpg_excerpt":"Sept cerveaux valent-ils mieux que trois ? Laboratoire \u00b7 m\u00e9ta-moteur Sept cerveaux valent-ils mieux que trois ? Apr\u00e8s Orion, le trio, voici Pl\u00e9iades : sept machines d’\u00e9checs des ann\u00e9es 1980-90, sept auteurs diff\u00e9rents, un arbitre Stockfish 18. R\u00e9unies, elles jouent trois classes au-dessus de la meilleure d’entre elles \u2014 et, \u00e0 l’occasion, sacrifient \u00e0 l’unanimit\u00e9. 2921cote Ordo (\u00b115),… Read…","_links":{"self":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4627"}],"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=4627"}],"version-history":[{"count":4,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4627\/revisions"}],"predecessor-version":[{"id":4664,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/posts\/4627\/revisions\/4664"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media\/4631"}],"wp:attachment":[{"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/media?parent=4627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/categories?post=4627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.chess.lumn.eu\/wordpress\/wp-json\/wp\/v2\/tags?post=4627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}