{"id":4671,"date":"2026-11-03T16:33:28","date_gmt":"2026-11-03T16:33:28","guid":{"rendered":"https:\/\/www.chess.lumn.eu\/wordpress\/?p=4671"},"modified":"2026-11-04T17:01:15","modified_gmt":"2026-11-04T17:01:15","slug":"saitek-sparc-54mhz","status":"publish","type":"post","link":"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/03\/saitek-sparc-54mhz\/","title":{"rendered":"Saitek Sparc \u00e0 54 MHz"},"content":{"rendered":"\n<link rel=\"preconnect\" href=\"https:\/\/fonts.googleapis.com\">\n<link href=\"https:\/\/fonts.googleapis.com\/css2?family=DM+Serif+Display&#038;family=DM+Sans:wght@400;500;700&#038;family=JetBrains+Mono:wght@400;600&#038;display=swap\" rel=\"stylesheet\">\n<style>\n.naum-body{--creme:#f7f4ee;--encre:#2b2b2b;--rouge:#c0392b;--or:#b8863b;--trait:#e3ddd0;--gris:#6b665c;\nmax-width:860px;margin:0 auto;padding:0 0 3rem;background:var(--creme);color:var(--encre);\nfont-family:\"DM Sans\",system-ui,sans-serif;font-size:1.03rem;line-height:1.68;}\n.naum-body 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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=\"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<\/defs><\/svg>\n<div class=\"hero\">\n<svg class=\"hero-bg\" viewBox=\"0 0 860 320\" preserveAspectRatio=\"xMidYMid slice\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\">\n<defs><pattern id=\"spgrid\" width=\"40\" height=\"40\" patternUnits=\"userSpaceOnUse\"><path d=\"M40 0H0v40\" fill=\"none\" stroke=\"#b8863b\" stroke-width=\".5\"\/><\/pattern><\/defs>\n<rect width=\"860\" height=\"320\" fill=\"url(#spgrid)\"\/>\n<circle cx=\"200\" cy=\"160\" r=\"80\" fill=\"none\" stroke=\"#b8863b\" stroke-width=\".8\"\/>\n<circle cx=\"200\" cy=\"160\" r=\"50\" fill=\"none\" stroke=\"#b8863b\" stroke-width=\".5\"\/>\n<line x1=\"280\" y1=\"160\" x2=\"400\" y2=\"160\" stroke=\"#b8863b\" stroke-width=\".5\"\/>\n<circle cx=\"640\" cy=\"100\" r=\"40\" fill=\"none\" stroke=\"#c0392b\" stroke-width=\".6\"\/>\n<line x1=\"680\" y1=\"100\" x2=\"780\" y2=\"100\" stroke=\"#c0392b\" stroke-width=\".4\"\/>\n<\/svg>\n<div class=\"hero-content\">\n<p class=\"eyebrow\">Laboratoire \u00b7 acc\u00e9l\u00e9ration<\/p>\n<h1 class=\"titre\">Saitek Sparc \u00e0 54&nbsp;MHz<\/h1>\n<p class=\"sous-titre\">Gauntlet acc\u00e9l\u00e9r\u00e9 CB-Emu&nbsp;: le programme de Dan et Kathe Spracklen, 2,7 fois plus vite<\/p>\n<div class=\"hero-machine\">\n<div class=\"hero-svg-wrap\">\n<svg viewBox=\"0 0 220 175\" width=\"220\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" role=\"img\" aria-label=\"Saitek Renaissance avec le module Sparc, dessin stylis\u00e9\">\n<rect x=\"12\" y=\"8\" width=\"196\" height=\"160\" rx=\"5\" fill=\"#2e2c2b\" stroke=\"#141312\" stroke-width=\"1.2\"\/>\n<rect x=\"20\" y=\"15\" width=\"118\" height=\"118\" fill=\"#141312\"\/>\n<g><defs><pattern id=\"spck\" x=\"22\" y=\"17\" width=\"28.5\" height=\"28.5\" patternUnits=\"userSpaceOnUse\"><rect width=\"28.5\" height=\"28.5\" fill=\"#e9e1cf\"\/><rect x=\"14.25\" width=\"14.25\" height=\"14.25\" fill=\"#8f6b4a\"\/><rect y=\"14.25\" width=\"14.25\" height=\"14.25\" fill=\"#8f6b4a\"\/><\/pattern><\/defs><rect x=\"22\" y=\"17\" width=\"114\" height=\"114\" fill=\"url(#spck)\"\/><\/g>\n<rect x=\"144\" y=\"15\" width=\"56\" height=\"118\" rx=\"2\" fill=\"#1d1c1b\"\/>\n<rect x=\"150\" y=\"22\" width=\"44\" height=\"34\" rx=\"2\" fill=\"#a7b59a\"\/>\n<text x=\"172\" y=\"35\" text-anchor=\"middle\" font-family=\"'JetBrains Mono',monospace\" font-size=\"6.5\" fill=\"#1f281b\">Dff6#<\/text>\n<text x=\"172\" y=\"46\" text-anchor=\"middle\" font-family=\"'JetBrains Mono',monospace\" font-size=\"5.5\" fill=\"#2c3826\">54 MHz<\/text>\n<defs><pattern id=\"sptk\" x=\"150\" y=\"62\" width=\"16\" height=\"12\" patternUnits=\"userSpaceOnUse\"><rect width=\"11\" height=\"7\" rx=\"1.5\" fill=\"#3a3734\" stroke=\"#58534d\" stroke-width=\".4\"\/><\/pattern><\/defs><rect x=\"150\" y=\"62\" width=\"48\" height=\"36\" fill=\"url(#sptk)\"\/>\n<rect x=\"150\" y=\"104\" width=\"44\" height=\"22\" rx=\"2\" fill=\"#0f0e0d\" stroke=\"#b8863b\" stroke-width=\".7\"\/>\n<text x=\"172\" y=\"118\" text-anchor=\"middle\" font-family=\"'JetBrains Mono',monospace\" font-size=\"6.5\" fill=\"#b8863b\" letter-spacing=\".8\">SPARC<\/text>\n<rect x=\"20\" y=\"139\" width=\"180\" height=\"22\" rx=\"2\" fill=\"#1d1c1b\"\/>\n<text x=\"28\" y=\"153\" font-family=\"'DM Serif Display',Georgia,serif\" font-size=\"9.5\" fill=\"#b8863b\" letter-spacing=\".5\">SAITEK<\/text>\n<text x=\"66\" y=\"153\" font-family=\"'DM Sans',sans-serif\" font-size=\"7\" fill=\"#a09882\" letter-spacing=\"1.2\">RENAISSANCE<\/text>\n<text x=\"196\" y=\"153\" text-anchor=\"end\" font-family=\"'JetBrains Mono',monospace\" font-size=\"6\" fill=\"#6b665c\">SPARClite \u00b7 \u00d72,7<\/text>\n<\/svg>\n<\/div>\n<div class=\"hero-specs\">\n<div class=\"spec\"><div class=\"sv\">2358<\/div><div class=\"sl\">Elo \u00b115<\/div><\/div>\n<div class=\"spec\"><div class=\"sv\">\u00d72,7<\/div><div class=\"sl\">20 \u2192 54 MHz<\/div><\/div>\n<div class=\"spec\"><div class=\"sv\">153<\/div><div class=\"sl\">parties<\/div><\/div>\n<div class=\"spec\"><div class=\"sv\">+182<\/div><div class=\"sl\">gain vs base<\/div><\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n\n<div class=\"article-body\">\n\n<div class=\"badge\">Gauntlet termin\u00e9 \u00b7 3 novembre 2026 \u00b7 cote Ordo<\/div>\n\n<p class=\"chapeau\">Le module Sparc de Saitek (1993) fait tourner le programme de Dan et Kathe Spracklen sur un processeur SPARClite \u00e0 20&nbsp;MHz, enfich\u00e9 dans l&#8217;\u00e9chiquier Renaissance. \u00c9mul\u00e9 par CB-Emu (MessChess\/MAME), il est ici acc\u00e9l\u00e9r\u00e9 \u00d72,7, soit 54&nbsp;MHz. Un gauntlet en \u00e9chelle l&#8217;a oppos\u00e9 \u00e0 26&nbsp;adversaires cot\u00e9s de 2029 \u00e0 2368. R\u00e9sultat&nbsp;: <strong>2358 \u00b115 Elo sur 153 parties<\/strong> selon Ordo, soit 182&nbsp;points de plus que le Sparc d&#8217;origine (2176). C&#8217;est le plus fort gain par doublement de fr\u00e9quence mesur\u00e9 au laboratoire. Et une partie \u00e0 retenir&nbsp;: une victoire contre Gideon, le programme qui avait priv\u00e9 le Sparc du titre mondial \u00e0 Madrid en 1992.<\/p>\n\n<div class=\"chiffre-cle\">\n<div class=\"cc\"><div class=\"val\">2358<\/div><div class=\"lab\">Elo Ordo, 153 parties<\/div><\/div>\n<div class=\"cc\"><div class=\"val\">+182<\/div><div class=\"lab\">sur le Sparc d&#8217;origine (2176)<\/div><\/div>\n<div class=\"cc\"><div class=\"val\">67,6 %<\/div><div class=\"lab\">score (103,5 \/ 153)<\/div><\/div>\n<div class=\"cc\"><div class=\"val\">127<\/div><div class=\"lab\">points par doublement de fr\u00e9quence<\/div><\/div>\n<\/div>\n\n<h2 class=\"sect\">1. R\u00e9sultats d\u00e9taill\u00e9s par adversaire<\/h2>\n<div class=\"tbl-wrap\"><table>\n<thead><tr><th>Adversaire<\/th><th class=\"n\">Elo<\/th><th class=\"n\">Score<\/th><th class=\"n\">%<\/th><th class=\"n\">Perf<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Chess Genius 3 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2368<\/td><td class=\"n\">0 \/ 1<\/td><td class=\"n\">0<\/td><td class=\"n\">\u2014<\/td><\/tr>\n<tr><td>Mephisto Genius 68030 London<\/td><td class=\"n\">2363<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2554<\/td><\/tr>\n<tr><td>Fruit 2.1 (ARM9 30&nbsp;MHz)<\/td><td class=\"n\">2355<\/td><td class=\"n\">0,5 \/ 6<\/td><td class=\"n\">8<\/td><td class=\"n\">1938<\/td><\/tr>\n<tr><td>MChess Pro 6 (Pentium 90&nbsp;MHz)<\/td><td class=\"n\">2341<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2532<\/td><\/tr>\n<tr><td>Chess Genius 1 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2339<\/td><td class=\"n\">4 \/ 6<\/td><td class=\"n\">67<\/td><td class=\"n\">2459<\/td><\/tr>\n<tr><td>Gideon 3.1 ChessMachine 32&nbsp;MHz<\/td><td class=\"n\">2335<\/td><td class=\"n\">3,5 \/ 6<\/td><td class=\"n\">58<\/td><td class=\"n\">2393<\/td><\/tr>\n<tr><td>The King 2.54 ChessMachine 14&nbsp;MHz<\/td><td class=\"n\">2325<\/td><td class=\"n\">2 \/ 6<\/td><td class=\"n\">33<\/td><td class=\"n\">2205<\/td><\/tr>\n<tr><td>Mephisto Berlin Pro 68020<\/td><td class=\"n\">2315<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2506<\/td><\/tr>\n<tr><td>MChess Pro 6 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2270<\/td><td class=\"n\">6 \/ 6<\/td><td class=\"n\">100<\/td><td class=\"n\">\u2014<\/td><\/tr>\n<tr><td>Fritz 1 (Pentium 90&nbsp;MHz)<\/td><td class=\"n\">2268<\/td><td class=\"n\">3,5 \/ 6<\/td><td class=\"n\">58<\/td><td class=\"n\">2326<\/td><\/tr>\n<tr><td>Fruit 2.1 (68040 40&nbsp;MHz)<\/td><td class=\"n\">2256<\/td><td class=\"n\">3,5 \/ 7<\/td><td class=\"n\">50<\/td><td class=\"n\">2256<\/td><\/tr>\n<tr><td>Fritz 3 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2255<\/td><td class=\"n\">4 \/ 6<\/td><td class=\"n\">67<\/td><td class=\"n\">2375<\/td><\/tr>\n<tr><td>Fritz 2 (Pentium 90&nbsp;MHz)<\/td><td class=\"n\">2244<\/td><td class=\"n\">3 \/ 7<\/td><td class=\"n\">43<\/td><td class=\"n\">2194<\/td><\/tr>\n<tr><td>Mephisto RISC II (14&nbsp;MHz)<\/td><td class=\"n\">2221<\/td><td class=\"n\">5 \/ 6<\/td><td class=\"n\">83<\/td><td class=\"n\">2501<\/td><\/tr>\n<tr><td>Rebel 9 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2214<\/td><td class=\"n\">4 \/ 6<\/td><td class=\"n\">67<\/td><td class=\"n\">2334<\/td><\/tr>\n<tr><td>Rebel 6 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2198<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2389<\/td><\/tr>\n<tr><td>MChess 1.71 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2188<\/td><td class=\"n\">4 \/ 6<\/td><td class=\"n\">67<\/td><td class=\"n\">2308<\/td><\/tr>\n<tr class=\"ici\"><td>Saitek Sparc (rev. 518), 20&nbsp;MHz<\/td><td class=\"n\">2176<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2367<\/td><\/tr>\n<tr><td>Fritz 2 (486DX 33&nbsp;MHz)<\/td><td class=\"n\">2171<\/td><td class=\"n\">4 \/ 6<\/td><td class=\"n\">67<\/td><td class=\"n\">2291<\/td><\/tr>\n<tr><td>Fidelity Elite Avantgarde V9<\/td><td class=\"n\">2125<\/td><td class=\"n\">3,5 \/ 6<\/td><td class=\"n\">58<\/td><td class=\"n\">2183<\/td><\/tr>\n<tr><td>Mephisto Berlin 68000<\/td><td class=\"n\">2116<\/td><td class=\"n\">6 \/ 6<\/td><td class=\"n\">100<\/td><td class=\"n\">\u2014<\/td><\/tr>\n<tr><td>Novag Sapphire<\/td><td class=\"n\">2096<\/td><td class=\"n\">6 \/ 6<\/td><td class=\"n\">100<\/td><td class=\"n\">\u2014<\/td><\/tr>\n<tr><td>Fidelity Designer Mach IV<\/td><td class=\"n\">2092<\/td><td class=\"n\">5 \/ 6<\/td><td class=\"n\">83<\/td><td class=\"n\">2372<\/td><\/tr>\n<tr><td>Fidelity Par Excellence 73&nbsp;MHz<\/td><td class=\"n\">2088<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2279<\/td><\/tr>\n<tr><td>Novag Constellation Forte A 91&nbsp;MHz<\/td><td class=\"n\">2055<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2246<\/td><\/tr>\n<tr><td>Fidelity Designer Mach III<\/td><td class=\"n\">2029<\/td><td class=\"n\">4,5 \/ 6<\/td><td class=\"n\">75<\/td><td class=\"n\">2220<\/td><\/tr>\n<tr class=\"tot\"><td>Total (adversaire moyen)<\/td><td class=\"n\">2219<\/td><td class=\"n\">103,5 \/ 153<\/td><td class=\"n\">68<\/td><td class=\"n\">2357<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p class=\"legende\">Cotes Ordo de la <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/22\/performance-elo\/\">liste maison<\/a> (3&nbsp;novembre 2026). Perf&nbsp;= cote de l&#8217;adversaire + 400\u00b7log<sub>10<\/sub>(p\/(1\u2212p))&nbsp;; pas de perf sur un score de 0 ou de 100&nbsp;%. 89&nbsp;victoires, 29&nbsp;nulles, 35&nbsp;d\u00e9faites&nbsp;; 54\/78 avec les Blancs (69,2&nbsp;%), 49,5\/75 avec les Noirs (66,0&nbsp;%). La perf totale, qui r\u00e9sout la somme des scores attendus contre les 26&nbsp;cotes, donne 2357, en accord avec la cote Ordo de 2358&nbsp;\u00b115. L&#8217;\u00e9chelle n&#8217;a donn\u00e9 qu&#8217;une partie contre Chess Genius&nbsp;3 et sept contre Fritz&nbsp;2 sur Pentium et Fruit&nbsp;2.1 sur 68040.<\/p>\n\n<p>Le profil est celui d&#8217;une machine qui \u00e9crase tout ce qui est plus faible qu&#8217;elle. Sous 2300, le Sparc acc\u00e9l\u00e9r\u00e9 ne perd presque rien&nbsp;: 6\/6 contre la Sapphire, le Berlin 68000 et MChess Pro&nbsp;6 sur 486, 5\/6 contre le Designer Mach&nbsp;IV et le RISC&nbsp;II. Au-dessus, il tient t\u00eate aux meilleurs&nbsp;: 4,5\/6 contre le Genius 68030 London, MChess Pro&nbsp;6 sur Pentium et le Berlin Pro. Deux adversaires seulement lui r\u00e9sistent nettement&nbsp;: The King \u00e0 14&nbsp;MHz (2\/6) et surtout Fruit&nbsp;2.1 sur ARM9 (0,5\/6).<\/p>\n\n<h2 class=\"sect\">2. Ce que rapporte un doublement<\/h2>\n<p>Pour comparer des acc\u00e9l\u00e9rations diff\u00e9rentes, on rapporte le gain d&#8217;Elo au nombre de doublements de fr\u00e9quence. Avec \u00d72,7, le Sparc a doubl\u00e9 sa fr\u00e9quence 1,43&nbsp;fois&nbsp;: 182&nbsp;points, soit <strong>127&nbsp;points par doublement<\/strong>.<\/p>\n<div class=\"fig\"><svg viewBox=\"0 0 760 374\" role=\"img\" aria-label=\"Gain Elo par doublement de fr\u00e9quence, machines acc\u00e9l\u00e9r\u00e9es du laboratoire\" style=\"width:100%;height:auto;display:block\"><line x1=\"300.0\" y1=\"10\" x2=\"300.0\" y2=\"314\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"300.0\" y=\"329\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">0<\/text><line x1=\"380.0\" y1=\"10\" x2=\"380.0\" y2=\"314\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"380.0\" y=\"329\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">25<\/text><line x1=\"460.0\" y1=\"10\" x2=\"460.0\" y2=\"314\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"460.0\" y=\"329\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">50<\/text><line x1=\"540.0\" y1=\"10\" x2=\"540.0\" y2=\"314\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"540.0\" y=\"329\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">75<\/text><line x1=\"620.0\" y1=\"10\" x2=\"620.0\" y2=\"314\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"620.0\" y=\"329\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">100<\/text><line x1=\"700.0\" y1=\"10\" x2=\"700.0\" y2=\"314\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"700.0\" y=\"329\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">125<\/text><text x=\"290\" y=\"31.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\" font-weight=\"700\">Saitek Sparc 54&nbsp;MHz<\/text><rect x=\"300\" y=\"19.0\" width=\"406.4\" height=\"18\" fill=\"#c0392b\"\/><text x=\"712.4\" y=\"32.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">127<\/text><text x=\"290\" y=\"61.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Fidelity Par Excellence 73&nbsp;MHz<\/text><rect x=\"300\" y=\"49.0\" width=\"291.2\" height=\"18\" fill=\"#b8863b\"\/><text x=\"597.2\" y=\"62.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">91<\/text><text x=\"290\" y=\"91.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Saitek Turbo 16K 125&nbsp;MHz<\/text><rect x=\"300\" y=\"79.0\" width=\"268.8\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"574.8\" y=\"92.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">84<\/text><text x=\"290\" y=\"121.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Mephisto RISC II 56&nbsp;MHz<\/text><rect x=\"300\" y=\"109.0\" width=\"240.0\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"546.0\" y=\"122.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">75<\/text><text x=\"290\" y=\"151.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Novag Star Diamond 110&nbsp;MHz<\/text><rect x=\"300\" y=\"139.0\" width=\"201.6\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"507.6\" y=\"152.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">63<\/text><text x=\"290\" y=\"181.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Novag Constellation Forte A 91&nbsp;MHz<\/text><rect x=\"300\" y=\"169.0\" width=\"195.2\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"501.2\" y=\"182.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">61<\/text><text x=\"290\" y=\"211.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Saitek RISC 2500 400&nbsp;MHz<\/text><rect x=\"300\" y=\"199.0\" width=\"172.8\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"478.8\" y=\"212.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">54<\/text><text x=\"290\" y=\"241.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Mephisto Berlin Pro 230&nbsp;MHz<\/text><rect x=\"300\" y=\"229.0\" width=\"160.0\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"466.0\" y=\"242.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">50<\/text><text x=\"290\" y=\"271.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Psion Chess 2.13 \u00e0 1800&nbsp;MHz<\/text><rect x=\"300\" y=\"259.0\" width=\"108.8\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"414.8\" y=\"272.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">34<\/text><text x=\"290\" y=\"301.0\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"12.5\" fill=\"#2b2b2b\">Mephisto Genius 68030 London 240&nbsp;MHz<\/text><rect x=\"300\" y=\"289.0\" width=\"57.6\" height=\"18\" fill=\"#cfc6b4\"\/><text x=\"363.6\" y=\"302.0\" font-family=\"JetBrains Mono,monospace\" font-size=\"11.5\" fill=\"#2b2b2b\">18<\/text><text x=\"500\" y=\"372\" text-anchor=\"middle\" font-family=\"DM Sans,sans-serif\" font-size=\"12\" fill=\"#6b665c\">Points Elo gagn\u00e9s par doublement de la fr\u00e9quence<\/text><\/svg><\/div>\n<div class=\"tbl-wrap\"><table>\n<thead><tr><th>Machine acc\u00e9l\u00e9r\u00e9e<\/th><th>Programme<\/th><th class=\"n\">Facteur<\/th><th class=\"n\">Doublements<\/th><th class=\"n\">Gain<\/th><th class=\"n\">Par doublement<\/th><\/tr><\/thead>\n<tbody>\n<tr class=\"ici\"><td>Saitek Sparc 54&nbsp;MHz<\/td><td>Spracklen<\/td><td class=\"n\">\u00d72,7<\/td><td class=\"n\">1,43<\/td><td class=\"n\">+182<\/td><td class=\"n\">127<\/td><\/tr>\n<tr><td>Fidelity Par Excellence 73&nbsp;MHz<\/td><td>Spracklen (Sargon)<\/td><td class=\"n\">\u00d714,6<\/td><td class=\"n\">3,87<\/td><td class=\"n\">+351<\/td><td class=\"n\">91<\/td><\/tr>\n<tr><td>Saitek Turbo 16K 125&nbsp;MHz<\/td><td>Kaplan &amp; Barnes<\/td><td class=\"n\">\u00d710,6<\/td><td class=\"n\">3,41<\/td><td class=\"n\">+287<\/td><td class=\"n\">84<\/td><\/tr>\n<tr><td>Mephisto RISC II 56&nbsp;MHz<\/td><td>Schr\u00f6der (Gideon 3.1)<\/td><td class=\"n\">\u00d73,99<\/td><td class=\"n\">2,00<\/td><td class=\"n\">+150<\/td><td class=\"n\">75<\/td><\/tr>\n<tr><td>Novag Star Diamond 110&nbsp;MHz<\/td><td>Kittinger<\/td><td class=\"n\">\u00d74,3<\/td><td class=\"n\">2,10<\/td><td class=\"n\">+133<\/td><td class=\"n\">63<\/td><\/tr>\n<tr><td>Novag Constellation Forte A 91&nbsp;MHz<\/td><td>Kittinger<\/td><td class=\"n\">\u00d718,2<\/td><td class=\"n\">4,19<\/td><td class=\"n\">+254<\/td><td class=\"n\">61<\/td><\/tr>\n<tr><td>Saitek RISC 2500 400&nbsp;MHz<\/td><td>de Koning<\/td><td class=\"n\">\u00d728<\/td><td class=\"n\">4,81<\/td><td class=\"n\">+260<\/td><td class=\"n\">54<\/td><\/tr>\n<tr><td>Mephisto Berlin Pro 230&nbsp;MHz<\/td><td>Lang<\/td><td class=\"n\">\u00d79,52<\/td><td class=\"n\">3,25<\/td><td class=\"n\">+162<\/td><td class=\"n\">50<\/td><\/tr>\n<tr><td>Psion Chess 2.13 \u00e0 1800&nbsp;MHz<\/td><td>Lang<\/td><td class=\"n\">\u00d7112,5<\/td><td class=\"n\">6,81<\/td><td class=\"n\">+234<\/td><td class=\"n\">34<\/td><\/tr>\n<tr><td>Mephisto Genius 68030 London 240&nbsp;MHz<\/td><td>Lang (ChessGenius)<\/td><td class=\"n\">\u00d77,26<\/td><td class=\"n\">2,86<\/td><td class=\"n\">+51<\/td><td class=\"n\">18<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p class=\"legende\">Gains publi\u00e9s dans les articles du laboratoire, chacun par rapport \u00e0 la machine d&#8217;origine. Doublements&nbsp;= log<sub>2<\/sub>(facteur).<\/p>\n\n<p>C&#8217;est le record du laboratoire, et de loin&nbsp;: 36&nbsp;points de plus que le Par Excellence \u00e0 73&nbsp;MHz, qui tenait la t\u00eate. Le rapprochement est d&#8217;autant plus parlant que les deux programmes sont des m\u00eames auteurs, Dan et Kathe Spracklen&nbsp;: le Par Excellence de 1986 chez Fidelity, le Sparc de 1993 chez Saitek.<\/p>\n\n<p>Il faut pourtant lire ce record avec deux pr\u00e9cautions. D&#8217;abord, le Sparc n&#8217;a \u00e9t\u00e9 acc\u00e9l\u00e9r\u00e9 que 2,7&nbsp;fois, moins que toutes les autres machines du tableau. Or les premiers doublements rapportent le plus&nbsp;: le Psion \u00e0 1800&nbsp;MHz l&#8217;a montr\u00e9, chaque doublement suppl\u00e9mentaire rapporte un peu moins. Sur ses deux premiers doublements seulement, le Par Excellence a sans doute gagn\u00e9 plus que ses 91&nbsp;points de moyenne. Ensuite, le gain repose sur deux cotes, 2358&nbsp;\u00b115 et 2176&nbsp;\u00b18&nbsp;: \u00e0 un \u00e9cart type pr\u00e8s, il va de 165 \u00e0 199&nbsp;points, soit de 115 \u00e0 139 par doublement. M\u00eame en bas de cette fourchette, le Sparc reste en t\u00eate.<\/p>\n\n<p>Une v\u00e9rification directe va dans le m\u00eame sens. Contre le Sparc d&#8217;origine, le Sparc acc\u00e9l\u00e9r\u00e9 marque 4,5\/6, soit 75&nbsp;%&nbsp;: c&#8217;est presque exactement le score qu&#8217;annoncent 182&nbsp;points d&#8217;\u00e9cart (74&nbsp;%).<\/p>\n\n<div class=\"retenir\"><span class=\"mot\">Ce qu&#8217;il faut retenir<\/span>\n<p>\u00c0 54&nbsp;MHz, le Sparc (2358) rejoint un trio presque parfait&nbsp;: la Star Diamond \u00e0 110&nbsp;MHz (2360), le Mephisto Genius 68030 London d&#8217;origine (2363) et le RISC&nbsp;II \u00e0 56&nbsp;MHz (2373). Il y arrive avec la plus petite acc\u00e9l\u00e9ration des trois machines acc\u00e9l\u00e9r\u00e9es, et avec le meilleur rendement par doublement mesur\u00e9 au laboratoire.<\/p><\/div>\n\n<h2 class=\"sect\">3. Corroboration externe<\/h2>\n<p>La <a href=\"https:\/\/www.schach-computer.info\/wiki\/index.php\/Wiki-Elo-Liste\">Wiki-Elo-Liste<\/a> de schach-computer.info cote les machines r\u00e9elles. Elle ne conna\u00eet pas de Sparc acc\u00e9l\u00e9r\u00e9, mais elle donne au Sparc d&#8217;origine environ 2218, selon <a href=\"https:\/\/chesscomputeruk.com\/html\/saitek_renaissance_sparc.html\">chesscomputeruk.com<\/a> qui la cite. Les valeurs des autres machines sont celles de l&#8217;\u00e9tat de d\u00e9cembre 2025, colonne \u00ab&nbsp;Aktiv&nbsp;\u00bb (parties d&#8217;une demi-heure).<\/p>\n<div class=\"tbl-wrap\"><table>\n<thead><tr><th>Machine<\/th><th>Processeur<\/th><th class=\"n\">Wiki-Elo (Aktiv)<\/th><th class=\"n\">Liste maison<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>Novag Constellation Forte A<\/td><td>6502 5&nbsp;MHz<\/td><td class=\"n\">1858<\/td><td class=\"n\">1803<\/td><\/tr>\n<tr class=\"ici\"><td>Saitek Sparc<\/td><td>SPARClite 20&nbsp;MHz<\/td><td class=\"n\">\u2248&nbsp;2218<\/td><td class=\"n\">2176<\/td><\/tr>\n<tr class=\"ici\"><td>Saitek Sparc acc\u00e9l\u00e9r\u00e9<\/td><td>SPARClite \u00ab&nbsp;54&nbsp;MHz&nbsp;\u00bb \u00e9mul\u00e9<\/td><td class=\"n\">\u2014<\/td><td class=\"n\">2358<\/td><\/tr>\n<tr><td>Mephisto Risc 2 (RISC II)<\/td><td>ARM2 14&nbsp;MHz<\/td><td class=\"n\">2246<\/td><td class=\"n\">2221<\/td><\/tr>\n<tr><td>Mephisto London 68030<\/td><td>68030 33&nbsp;MHz<\/td><td class=\"n\">2367<\/td><td class=\"n\">2363<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p class=\"legende\">Les deux listes n&#8217;ont ni la m\u00eame \u00e9chelle ni la m\u00eame cadence (15&nbsp;s par coup chez nous). On compare donc les \u00e9carts, pas les chiffres bruts. Le <a href=\"https:\/\/www.schachcomputer-online-museum.de\/index-1\/saitek\/saitek-modul-sparc-1993\/\">Schachcomputer-Online-Museum<\/a> donne 2225 au Sparc, sans pr\u00e9ciser la liste.<\/p>\n\n<p>La liste maison place le Sparc d&#8217;origine une quarantaine de points sous la Wiki-Elo, comme elle le fait pour le Forte A (55&nbsp;points) et le RISC&nbsp;II (25&nbsp;points). Le Sparc \u00e0 20&nbsp;MHz n&#8217;est donc pas sous-cot\u00e9 chez nous, et le gain de 182&nbsp;points ne vient pas d&#8217;un point de d\u00e9part trop bas. Les deux listes placent le Sparc d&#8217;origine un peu sous le RISC&nbsp;II, de 28&nbsp;points pour la Wiki-Elo et de 45 chez nous. Acc\u00e9l\u00e9r\u00e9 \u00e0 54&nbsp;MHz, il rattrape le London.<\/p>\n\n<h2 class=\"sect\">4. La partie la plus spectaculaire<\/h2>\n<p class=\"eyebrow\">Gauntlet du Sparc acc\u00e9l\u00e9r\u00e9 \u00b7 3 novembre 2026 \u00b7 cadence 60\/900<\/p>\n<div class=\"joueurs\"><span>Saitek Sparc 54 MHz<b>2358<\/b><\/span><span>Gideon 3.1 ChessMachine 32 MHz<b>2335<\/b><\/span><span>1-0 en 71 coups<\/span><\/div>\n<p>Madrid, novembre 1992, championnat du monde des ordinateurs d&#8217;\u00e9checs&nbsp;: au dernier tour, le Kasparov Sparc perd contre Gideon, le programme d&#8217;Ed Schr\u00f6der sur ChessMachine, qui remporte le titre. Trente-quatre ans plus tard, le gauntlet a remis les deux programmes face \u00e0 face, Gideon en version 3.1 sur une ChessMachine \u00e0 32&nbsp;MHz. Le Sparc acc\u00e9l\u00e9r\u00e9 a marqu\u00e9 3,5&nbsp;points sur 6. Voici sa plus belle victoire&nbsp;: une partie qu&#8217;il aurait d\u00fb perdre au 25<sup>e<\/sup>&nbsp;coup, un \u00e9change de Dames que Gideon n&#8217;aurait jamais d\u00fb proposer, et deux Dames pour finir.<\/p>\n<div class=\"fig\"><svg viewBox=\"0 0 760 236\" role=\"img\" aria-label=\"\u00c9valuation de Stockfish 16 et de Gideon, point de vue du Sparc\" style=\"width:100%;height:auto;display:block\"><rect x=\"40\" y=\"12\" width=\"708\" height=\"96.0\" fill=\"rgba(192,57,43,.06)\"\/><line x1=\"40\" y1=\"204.0\" x2=\"748\" y2=\"204.0\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"34\" y=\"208.0\" text-anchor=\"end\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">-10<\/text><line x1=\"40\" y1=\"156.0\" x2=\"748\" y2=\"156.0\" stroke=\"#e3ddd0\" stroke-width=\"1\"\/><text x=\"34\" y=\"160.0\" text-anchor=\"end\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">-5<\/text><line x1=\"40\" y1=\"108.0\" x2=\"748\" 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732.9,12.0 738.0,12.0 743.0,12.0 748.0,12.0\" fill=\"none\" stroke=\"#c0392b\" stroke-width=\"2.2\"\/><line x1=\"135.4\" y1=\"12\" x2=\"135.4\" y2=\"204\" stroke=\"#b8863b\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/><text x=\"135.4\" y=\"222\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">10<\/text><line x1=\"286.0\" y1=\"12\" x2=\"286.0\" y2=\"204\" stroke=\"#b8863b\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/><text x=\"286.0\" y=\"222\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">25<\/text><line x1=\"436.7\" y1=\"12\" x2=\"436.7\" y2=\"204\" stroke=\"#b8863b\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/><text x=\"436.7\" y=\"222\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">40<\/text><line x1=\"597.4\" y1=\"12\" x2=\"597.4\" y2=\"204\" stroke=\"#b8863b\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/><text x=\"597.4\" y=\"222\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">56<\/text><line x1=\"748.0\" y1=\"12\" x2=\"748.0\" y2=\"204\" stroke=\"#b8863b\" stroke-width=\"1\" stroke-dasharray=\"2 4\"\/><text x=\"748.0\" y=\"222\" text-anchor=\"middle\" font-family=\"JetBrains Mono,monospace\" font-size=\"10.5\" fill=\"#6b665c\">71<\/text><text x=\"286.0\" y=\"146.5\" text-anchor=\"middle\" font-family=\"DM Sans,sans-serif\" font-size=\"11.5\" fill=\"#c0392b\">25.Tf1&nbsp;?<\/text><text x=\"435.7\" y=\"51.7\" text-anchor=\"end\" font-family=\"DM Sans,sans-serif\" font-size=\"11.5\" fill=\"#c0392b\">40\u2026Df6&nbsp;??<\/text><line x1=\"56\" y1=\"230\" x2=\"80\" y2=\"230\" stroke=\"#c0392b\" stroke-width=\"2.2\"\/><text x=\"86\" y=\"233.5\" font-family=\"DM Sans,sans-serif\" font-size=\"11\" fill=\"#2b2b2b\">Stockfish 16<\/text><line x1=\"176\" y1=\"230\" x2=\"200\" y2=\"230\" stroke=\"#6b665c\" stroke-width=\"1.6\" stroke-dasharray=\"4 3\"\/><text x=\"206\" y=\"233.5\" font-family=\"DM Sans,sans-serif\" font-size=\"11\" fill=\"#2b2b2b\">ce qu&#8217;affichait Gideon (retourn\u00e9)<\/text><\/svg><\/div>\n<p class=\"legende\">Trait plein&nbsp;: \u00e9valuation de Stockfish&nbsp;16 du point de vue du Sparc (Blancs) apr\u00e8s chaque demi-coup, plafonn\u00e9e \u00e0 \u00b110. Pointill\u00e9&nbsp;: l&#8217;\u00e9valuation qu&#8217;affichait Gideon lui-m\u00eame, retourn\u00e9e au m\u00eame point de vue. La zone teint\u00e9e correspond \u00e0 l&#8217;avantage du Sparc.<\/p>\n\n<h3 class=\"ssect\">Le double oubli du 25<sup>e<\/sup> coup<\/h3>\n<p>Apr\u00e8s un gambit dame refus\u00e9 sans histoire, le Sparc s&#8217;enlise au milieu de partie&nbsp;: 20.Td1, 22.Db4, puis 24.e4&nbsp;?! laissent les Noirs nettement mieux, \u00e0 \u22121,75 selon Stockfish&nbsp;16. Gideon rafle alors le pion f2 (24\u2026Txf2), et le Sparc r\u00e9pond par la faute de la partie&nbsp;: <b>25.Tf1&nbsp;?<\/b>, au lieu de 25.exd5&nbsp;!, qui \u00e9galisait.<\/p>\n<figure class=\"diag\"><div class=\"sd2d\" data-f=\"r5k1\/pp3qp1\/2pQn2p\/3pP1p1\/4P3\/2N5\/PP3rPP\/2R2RK1 b - - 1 25\" data-u=\"d1f1\"><\/div><figcaption>Apr\u00e8s 25.Tf1&nbsp;? 25\u2026Tf8&nbsp;! 26.Dxf8+ Dxf8 27.Txf2 Dc5 cloue la Tour f2&nbsp;: plus de deux pions d&#8217;avance pour les Noirs selon Stockfish&nbsp;16.<\/figcaption><\/figure>\n<p>Gideon ne le voit pas. Il joue <b>25\u2026Txf1+&nbsp;?<\/b>, \u00e9change une paire de Tours, et l&#8217;\u00e9valuation revient \u00e0 0,00. Il ne s&#8217;\u00e9tait d&#8217;ailleurs jamais cru mieux&nbsp;: au moment o\u00f9 Stockfish&nbsp;16 lui donnait plus de deux pions d&#8217;avance, il s&#8217;estimait \u00e0 \u22121,17. Le Sparc, lui, s&#8217;attribuait +0,20.<\/p>\n\n<h3 class=\"ssect\">L&#8217;\u00e9change de Dames qui perd<\/h3>\n<p>Le Sparc r\u00e9cup\u00e8re ensuite son pion (27\u2026d4 28.Dxd4) et prend l&#8217;avantage, le laisse filer (31.Dg6&nbsp;?, 33.e6&nbsp;?!), puis voit Gideon se tromper \u00e0 son tour&nbsp;: 38\u2026Ce6&nbsp;? et 39\u2026g4 donnent +4,6 aux Blancs. Apr\u00e8s 40.h4&nbsp;?, qui laissait passer le gain direct 40.Dxf3 gxf3 41.Rf2, Gideon commet la faute d\u00e9cisive.<\/p>\n<figure class=\"diag\"><div class=\"sd2d\" data-f=\"8\/6pk\/2p1nq2\/7p\/4P1pP\/2N3P1\/PP3Q2\/6K1 w - - 1 41\" data-u=\"f3f6\"><\/div><figcaption>Apr\u00e8s 40\u2026Df6&nbsp;??&nbsp;: Gideon offre l&#8217;\u00e9change des Dames. Apr\u00e8s 41.Dxf6 gxf6, la finale de Cavaliers est perdue (+5,2).<\/figcaption><\/figure>\n<p>Dans la finale, le Sparc a un pion de plus et, surtout, un pion a pass\u00e9 que le Cavalier noir ne peut pas arr\u00eater seul. Le Roi blanc monte en d4 puis en c5, le Cavalier ramasse le pion h5 (48.Cxh5), et <b>56.a6<\/b> d\u00e9cide&nbsp;: Stockfish&nbsp;16 donne alors plus de 34&nbsp;pions aux Blancs.<\/p>\n\n<h3 class=\"ssect\">Deux Dames pour finir<\/h3>\n<figure class=\"diag\"><div class=\"sd2d\" data-f=\"1K5Q\/8\/5Qk1\/8\/8\/8\/1P6\/8 b - - 4 71\" data-u=\"f3f6\"><\/div><figcaption>71.Dff6#. Les deux pions pass\u00e9s, a et h, sont all\u00e9s \u00e0 Dame&nbsp;; la seconde Dame donne le mat.<\/figcaption><\/figure>\n<p>Le Roi blanc prend le Cavalier a8, le pion h va \u00e0 Dame au 67<sup>e<\/sup>&nbsp;coup, le pion a au 69<sup>e<\/sup>, et 71.Dff6 est mat. Gideon n&#8217;a mesur\u00e9 son retard qu&#8217;au 57<sup>e<\/sup>&nbsp;coup (\u22125,95)&nbsp;; jusque-l\u00e0, il ne s&#8217;\u00e9tait jamais donn\u00e9 pire que \u22123,81.<\/p>\n\n<h3 class=\"ssect\">Rejouer la partie<\/h3>\n<div class=\"rejeu\" id=\"sd-rejeu\">\n<div>\n<div id=\"sd-board\"><\/div>\n<div class=\"rj-ctrl\">\n<button type=\"button\" id=\"sd-deb\" aria-label=\"D\u00e9but\">\u23ee<\/button>\n<button type=\"button\" id=\"sd-prec\" aria-label=\"Coup pr\u00e9c\u00e9dent\">\u25c0<\/button>\n<button type=\"button\" id=\"sd-suiv\" aria-label=\"Coup suivant\">\u25b6<\/button>\n<button type=\"button\" id=\"sd-fin\" aria-label=\"Fin\">\u23ed<\/button>\n<span class=\"rj-pos\" id=\"sd-pos\"><\/span>\n<\/div>\n<\/div>\n<div>\n<div class=\"rj-com\" id=\"sd-com\" aria-live=\"polite\"><\/div>\n<div class=\"rj-liste\" id=\"sd-liste\"><\/div>\n<\/div>\n<\/div>\n<p class=\"legende\">Cliquez un coup, ou utilisez les fl\u00e8ches \u2190 \u2192 du clavier une fois l&#8217;\u00e9chiquier survol\u00e9. Les coups en gras sont comment\u00e9s. Sous chaque commentaire&nbsp;: l&#8217;\u00e9valuation affich\u00e9e par la machine qui vient de jouer, avec sa profondeur et son temps, et celle de Stockfish&nbsp;16 (environ 0,8&nbsp;s par position) du point de vue du Sparc.<\/p>\n\n<h2 class=\"sect\">5. Observations notables<\/h2>\n\n<h3 class=\"ssect\">La b\u00eate noire&nbsp;: Fruit 2.1 sur ARM9<\/h3>\n<p>Contre Fruit&nbsp;2.1 sur ARM9 \u00e0 30&nbsp;MHz, le Sparc acc\u00e9l\u00e9r\u00e9 ne marque qu&#8217;une nulle en six parties (perf 1938), alors que le m\u00eame Fruit sur 68040 \u00e0 40&nbsp;MHz lui laisse 3,5\/7. Les cinq d\u00e9faites sont toutes des parties jou\u00e9es jusqu&#8217;au mat, sans incident.<\/p>\n\n<h3 class=\"ssect\">Face aux ChessMachine<\/h3>\n<p>3,5\/6 contre Gideon&nbsp;3.1 \u00e0 32&nbsp;MHz, mais 2\/6 seulement contre The King&nbsp;2.54 \u00e0 14&nbsp;MHz, pourtant cot\u00e9 dix points de moins. Avec Fruit sur ARM9, c&#8217;est contre le programme de Johan de Koning que le Sparc acc\u00e9l\u00e9r\u00e9 fait son plus mauvais score.<\/p>\n\n<h3 class=\"ssect\">Contre lui-m\u00eame<\/h3>\n<p>4,5\/6 contre le Sparc d&#8217;origine&nbsp;: trois victoires et trois nulles, aucune d\u00e9faite. Le score colle \u00e0 l&#8217;\u00e9cart des deux cotes (75&nbsp;% marqu\u00e9s, 74&nbsp;% attendus).<\/p>\n\n<h3 class=\"ssect\">Un livre qui varie<\/h3>\n<p>Trois des 153&nbsp;parties seulement r\u00e9p\u00e8tent coup pour coup une autre partie du gauntlet, contre une pour la Star Diamond et 19 pour le RISC&nbsp;II acc\u00e9l\u00e9r\u00e9. Le Sparc dispose d&#8217;une biblioth\u00e8que d&#8217;ouvertures d&#8217;environ 300&nbsp;000&nbsp;positions.<\/p>\n\n<h3 class=\"ssect\">Et sur le Mac&nbsp;?<\/h3>\n<p>Sous MAME 0.289, sur le MacBook du laboratoire, le Sparc d&#8217;origine pose une \u00e9nigme&nbsp;: il \u00e9choue presque partout aux tests BT, mais finit troisi\u00e8me du tournoi des trente machines (voir <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/03\/cbemu-sur-mac\/\">CB-Emu sur Mac<\/a>). Rien de tel ici&nbsp;: sous MessChess, sur le PC, le Sparc acc\u00e9l\u00e9r\u00e9 joue exactement au niveau que laissent attendre la cote du Sparc d&#8217;origine et le gain par doublement.<\/p>\n\n<h2 class=\"sect\">6. M\u00e9thodologie<\/h2>\n<h3 class=\"ssect\">\u00c9mulation<\/h3>\n<p>Pilote <code>sparc<\/code> de MessChess, avec le greffon chessengine de CB-Emu et le relais UCI du laboratoire. Le module tourne \u00d72,7 plus vite que l&#8217;original, soit 54&nbsp;MHz pour un SPARClite de 20&nbsp;MHz. Le relais traduit \u00e0 chaque partie la pendule de l&#8217;interface en niveau de la machine et lui fait jouer son coup au bout d&#8217;une quinzaine de secondes.<\/p>\n<h3 class=\"ssect\">Gauntlet<\/h3>\n<p>\u00c9chelle d&#8217;adversaires de la liste maison, en g\u00e9n\u00e9ral 6&nbsp;parties par adversaire en alternant les couleurs, 26&nbsp;adversaires de 2029 \u00e0 2368. Cadence 60&nbsp;coups en 15&nbsp;minutes, livres propres de chaque machine, cutechess-cli, plusieurs parties en m\u00eame temps, du 2&nbsp;novembre \u00e0 15&nbsp;h&nbsp;14 au 3&nbsp;novembre \u00e0 5&nbsp;h&nbsp;57. Aucune des 153&nbsp;parties ne s&#8217;est termin\u00e9e au temps&nbsp;: 124 par mat, 29 par nulle. La cote est celle d&#8217;Ordo, calcul\u00e9e avec l&#8217;ensemble des parties de la liste maison.<\/p>\n\n<h2 class=\"sect\">7. Conclusion<\/h2>\n<div class=\"box\"><span class=\"box-titre\">R\u00e9sultat d\u00e9finitif<\/span>\n<p><strong>Saitek Sparc \u00e0 54&nbsp;MHz&nbsp;: 2358 \u00b115 Elo<\/strong> (Ordo, 153&nbsp;parties), 182&nbsp;points au-dessus du module d&#8217;origine. \u00c0 127&nbsp;points par doublement, le programme de Dan et Kathe Spracklen est celui qui profite le plus de la vitesse au laboratoire, devant leur propre Par Excellence. \u00c0 54&nbsp;MHz, le Sparc joue au niveau d&#8217;un Mephisto Genius 68030 London, et il a pris sa revanche sur Gideon.<\/p>\n<\/div>\n\n<hr>\n<h3 class=\"ssect\">Sources<\/h3>\n<ul class=\"sources\">\n<li>Liste maison&nbsp;: <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/22\/performance-elo\/\">Performance Elo, tournois maison<\/a> (Ordo, 3&nbsp;novembre 2026).<\/li>\n<li>Wiki-Elo-Liste, schach-computer.info, \u00e9tat de d\u00e9cembre 2025&nbsp;: <a href=\"https:\/\/www.schach-computer.info\/wiki\/index.php\/Wiki-Elo-Liste\">Wiki-Elo-Liste<\/a>&nbsp;; cote du Sparc cit\u00e9e par <a href=\"https:\/\/chesscomputeruk.com\/html\/saitek_renaissance_sparc.html\">chesscomputeruk.com, Saitek Renaissance Sparc<\/a>.<\/li>\n<li>Caract\u00e9ristiques du module&nbsp;: <a href=\"https:\/\/www.schachcomputer-online-museum.de\/index-1\/saitek\/saitek-modul-sparc-1993\/\">Schachcomputer-Online-Museum, Saitek Modul Sparc<\/a>&nbsp;; championnat de Madrid 1992&nbsp;: <a href=\"https:\/\/www.chessprogramming.org\/Kasparov_Sparc\">Chess Programming Wiki, Kasparov Sparc<\/a>.<\/li>\n<li>Articles du laboratoire&nbsp;: <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/03\/fidelity-par-excellence-73-mhz-le-choc-des-cadences\/\">Par Excellence \u00e0 73 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/02\/novag-star-diamond-110mhz\/\">Star Diamond \u00e0 110 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/02\/mephisto-risc-ii-56mhz\/\">RISC II \u00e0 56 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/05\/novag-constellation-forte-a-91-mhz\/\">Forte A \u00e0 91 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/26\/mephisto-berlin-pro-230mhz\/\">Berlin Pro \u00e0 230 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/25\/chess-genius-68030-240mhz\/\">Genius 68030 \u00e0 240 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/12\/psion-chess-2-13-286-1800-mhz\/\">Psion \u00e0 1800 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/09\/saitek-turbo-16k-a-125-mhz\/\">Turbo 16K \u00e0 125 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/10\/03\/saitek-risc-2500-a-400-mhz-le-veteran-de-1992-passe-la-surmultipliee\/\">RISC 2500 \u00e0 400 MHz<\/a>, <a href=\"https:\/\/www.chess.lumn.eu\/wordpress\/2026\/11\/03\/cbemu-sur-mac\/\">CB-Emu sur Mac<\/a>.<\/li>\n<li>Partie&nbsp;: PGN du gauntlet (cutechess-cli). Analyses de contr\u00f4le&nbsp;: Stockfish&nbsp;16.<\/li>\n<\/ul>\n<p class=\"sig\">chess.lumn.eu \u00b7 laboratoire \u00b7 novembre 2026<\/p>\n<\/div>\n\n<script>\n(function(){\nvar R = [{\"f\":\"rnbqkbnr\/pppppppp\/8\/8\/3P4\/8\/PPP1PPPP\/RNBQKBNR b - - 0 1\",\"s\":\"d4\",\"u\":\"d2d4\",\"w\":true,\"n\":1,\"c\":\"Gambit dame refus\u00e9. Le Sparc acc\u00e9l\u00e9r\u00e9 (Blancs) joue son propre livre. En face&nbsp;: <b>Gideon&nbsp;3.1 sur ChessMachine \u00e0 32&nbsp;MHz<\/b>, le programme d'Ed Schr\u00f6der, cot\u00e9 2335. 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Les Noirs sont nettement mieux&nbsp;: Stockfish&nbsp;16 leur donne 1,75&nbsp;pion.\",\"m\":\"\u22120,13 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"\u22121,75\"},{\"f\":\"r5k1\/pp3qp1\/2pQn2p\/3pP1p1\/4P3\/2N5\/PP3rPP\/2RR2K1 w - - 0 1\",\"s\":\"Txf2\",\"u\":\"f5f2\",\"w\":false,\"n\":24,\"c\":\"24\u2026Txf2 rafle le pion f2, mais 24\u2026Td8 \u00e9tait plus fort. Apr\u00e8s 25.exd5&nbsp;! les Blancs \u00e9galisaient.\",\"m\":\"\u22121,09 (prof.&nbsp;7, 23&nbsp;s)\",\"sf\":\"\u22120,24\"},{\"f\":\"r5k1\/pp3qp1\/2pQn2p\/3pP1p1\/4P3\/2N5\/PP3rPP\/2R2RK1 b - - 0 1\",\"s\":\"Tf1\",\"u\":\"d1f1\",\"w\":true,\"n\":25,\"c\":\"<b>25.Tf1&nbsp;?<\/b> La faute du Sparc&nbsp;: 25\u2026Tf8&nbsp;! 26.Dxf8+ Dxf8 27.Txf2 Dc5 clouait la Tour et laissait aux Noirs plus de deux pions d'avance selon Stockfish&nbsp;16.\",\"m\":\"+0,20 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"\u22122,34\"},{\"f\":\"r5k1\/pp3qp1\/2pQn2p\/3pP1p1\/4P3\/2N5\/PP4PP\/2R2rK1 w - - 0 1\",\"s\":\"Txf1+\",\"u\":\"f2f1\",\"w\":false,\"n\":25,\"c\":\"<b>25\u2026Txf1+&nbsp;?<\/b> Gideon \u00e9change tout de suite, et l'avantage dispara\u00eet&nbsp;: 0,00. Il s'estimait d'ailleurs moins bien (\u22121,17).\",\"m\":\"\u22121,17 (prof.&nbsp;8, 20&nbsp;s)\",\"sf\":\"+0,00\"},{\"f\":\"r5k1\/pp3qp1\/2pQn2p\/3pP1p1\/4P3\/2N5\/PP4PP\/5RK1 b - - 0 1\",\"s\":\"Txf1\",\"u\":\"c1f1\",\"w\":true,\"n\":26,\"c\":\"\",\"m\":\"+0,88 (prof.&nbsp;8, 17&nbsp;s)\",\"sf\":\"+0,00\"},{\"f\":\"r5k1\/pp3qp1\/2pQ3p\/3pP1p1\/4Pn2\/2N5\/PP4PP\/5RK1 w - - 0 1\",\"s\":\"Cf4\",\"u\":\"e6f4\",\"w\":false,\"n\":26,\"c\":\"\",\"m\":\"\u22121,17 (prof.&nbsp;7, 11&nbsp;s)\",\"sf\":\"+0,44\"},{\"f\":\"r5k1\/pp3qp1\/2pQ3p\/3pP1p1\/4Pn2\/2N3P1\/PP5P\/5RK1 b - - 0 1\",\"s\":\"g3\",\"u\":\"g2g3\",\"w\":true,\"n\":27,\"c\":\"\",\"m\":\"17,0&nbsp;s\",\"sf\":\"+0,21\"},{\"f\":\"r5k1\/pp3qp1\/2pQ3p\/4P1p1\/3pPn2\/2N3P1\/PP5P\/5RK1 w - - 0 1\",\"s\":\"d4\",\"u\":\"d5d4\",\"w\":false,\"n\":27,\"c\":\"\",\"m\":\"\u22121,41 (prof.&nbsp;8, 18&nbsp;s)\",\"sf\":\"+0,23\"},{\"f\":\"r5k1\/pp3qp1\/2p4p\/4P1p1\/3QPn2\/2N3P1\/PP5P\/5RK1 b - - 0 1\",\"s\":\"Dxd4\",\"u\":\"d6d4\",\"w\":true,\"n\":28,\"c\":\"\",\"m\":\"+1,10 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"+0,30\"},{\"f\":\"r5k1\/pp3qp1\/2p4p\/4P1p1\/3QP3\/2N3Pn\/PP5P\/5RK1 w - - 0 1\",\"s\":\"Ch3+\",\"u\":\"f4h3\",\"w\":false,\"n\":28,\"c\":\"Apr\u00e8s 27\u2026d4 28.Dxd4, le Sparc r\u00e9cup\u00e8re son pion et prend l'avantage (+1,4).\",\"m\":\"\u22121,29 (prof.&nbsp;8, 12&nbsp;s)\",\"sf\":\"+1,43\"},{\"f\":\"r5k1\/pp3qp1\/2p4p\/4P1p1\/3QP3\/2N3Pn\/PP4KP\/5R2 b - - 0 1\",\"s\":\"Rg2\",\"u\":\"g1g2\",\"w\":true,\"n\":29,\"c\":\"\",\"m\":\"17,0&nbsp;s\",\"sf\":\"+1,37\"},{\"f\":\"r5k1\/pp4p1\/2p1q2p\/4P1p1\/3QP3\/2N3Pn\/PP4KP\/5R2 w - - 0 1\",\"s\":\"De6\",\"u\":\"f7e6\",\"w\":false,\"n\":29,\"c\":\"\",\"m\":\"\u22121,43 (prof.&nbsp;8, 22&nbsp;s)\",\"sf\":\"+1,41\"},{\"f\":\"r5k1\/pp4p1\/2pQq2p\/4P1p1\/4P3\/2N3Pn\/PP4KP\/5R2 b - - 0 1\",\"s\":\"Dd6\",\"u\":\"d4d6\",\"w\":true,\"n\":30,\"c\":\"\",\"m\":\"+1,54 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"+1,70\"},{\"f\":\"r5k1\/pp4p1\/2pQ3p\/4P1p1\/4P1q1\/2N3Pn\/PP4KP\/5R2 w - - 0 1\",\"s\":\"Dg4\",\"u\":\"e6g4\",\"w\":false,\"n\":30,\"c\":\"\",\"m\":\"\u22121,86 (prof.&nbsp;7, 23&nbsp;s)\",\"sf\":\"+1,88\"},{\"f\":\"r5k1\/pp4p1\/2p3Qp\/4P1p1\/4P1q1\/2N3Pn\/PP4KP\/5R2 b - - 0 1\",\"s\":\"Dg6\",\"u\":\"d6g6\",\"w\":true,\"n\":31,\"c\":\"31.Dg6&nbsp;? laisse filer une bonne partie de l'avantage&nbsp;; 31.Tf5 gardait +1,9.\",\"m\":\"+1,69 (prof.&nbsp;6, 17&nbsp;s)\",\"sf\":\"+0,19\"},{\"f\":\"r5k1\/pp4p1\/2p3Q1\/4P1pp\/4P1q1\/2N3Pn\/PP4KP\/5R2 w - - 0 1\",\"s\":\"h5\",\"u\":\"h6h5\",\"w\":false,\"n\":31,\"c\":\"\",\"m\":\"\u22121,82 (prof.&nbsp;7, 22&nbsp;s)\",\"sf\":\"+0,40\"},{\"f\":\"r5k1\/pp3Qp1\/2p5\/4P1pp\/4P1q1\/2N3Pn\/PP4KP\/5R2 b - - 0 1\",\"s\":\"Df7+\",\"u\":\"g6f7\",\"w\":true,\"n\":32,\"c\":\"\",\"m\":\"+1,90 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"+1,18\"},{\"f\":\"r7\/pp3Qpk\/2p5\/4P1pp\/4P1q1\/2N3Pn\/PP4KP\/5R2 w - - 0 1\",\"s\":\"Rh7\",\"u\":\"g8h7\",\"w\":false,\"n\":32,\"c\":\"\",\"m\":\"\u22121,29 (prof.&nbsp;6, 17&nbsp;s)\",\"sf\":\"+0,78\"},{\"f\":\"r7\/pp3Qpk\/2p1P3\/6pp\/4P1q1\/2N3Pn\/PP4KP\/5R2 b - - 0 1\",\"s\":\"e6\",\"u\":\"e5e6\",\"w\":true,\"n\":33,\"c\":\"33.e6&nbsp;?! et la position redevient \u00e9gale.\",\"m\":\"+1,93 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"\u22120,07\"},{\"f\":\"r7\/pp3Qpk\/2p1P3\/6pp\/4Pnq1\/2N3P1\/PP4KP\/5R2 w - - 0 1\",\"s\":\"Cf4+\",\"u\":\"h3f4\",\"w\":false,\"n\":33,\"c\":\"\",\"m\":\"\u22121,73 (prof.&nbsp;6, 11&nbsp;s)\",\"sf\":\"+0,00\"},{\"f\":\"r7\/pp3Qpk\/2p1P3\/6pp\/4Pnq1\/2N3P1\/PP5P\/5R1K b - - 0 1\",\"s\":\"Rh1\",\"u\":\"g2h1\",\"w\":true,\"n\":34,\"c\":\"\",\"m\":\"+1,65 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"+0,00\"},{\"f\":\"r7\/pp3Qpk\/2p1n3\/6pp\/4P1q1\/2N3P1\/PP5P\/5R1K w - - 0 1\",\"s\":\"Cxe6\",\"u\":\"f4e6\",\"w\":false,\"n\":34,\"c\":\"\",\"m\":\"\u22121,65 (prof.&nbsp;6, 10&nbsp;s)\",\"sf\":\"+0,00\"},{\"f\":\"r7\/pQ4pk\/2p1n3\/6pp\/4P1q1\/2N3P1\/PP5P\/5R1K b - - 0 1\",\"s\":\"Dxb7\",\"u\":\"f7b7\",\"w\":true,\"n\":35,\"c\":\"\",\"m\":\"17,0&nbsp;s\",\"sf\":\"\u22120,20\"},{\"f\":\"5r2\/pQ4pk\/2p1n3\/6pp\/4P1q1\/2N3P1\/PP5P\/5R1K w - - 0 1\",\"s\":\"Tf8\",\"u\":\"a8f8\",\"w\":false,\"n\":35,\"c\":\"\",\"m\":\"\u22121,70 (prof.&nbsp;7, 22&nbsp;s)\",\"sf\":\"+0,88\"},{\"f\":\"5R2\/pQ4pk\/2p1n3\/6pp\/4P1q1\/2N3P1\/PP5P\/7K b - - 0 1\",\"s\":\"Txf8\",\"u\":\"f1f8\",\"w\":true,\"n\":36,\"c\":\"\",\"m\":\"17,0&nbsp;s\",\"sf\":\"+0,90\"},{\"f\":\"5n2\/pQ4pk\/2p5\/6pp\/4P1q1\/2N3P1\/PP5P\/7K w - - 0 1\",\"s\":\"Cxf8\",\"u\":\"e6f8\",\"w\":false,\"n\":36,\"c\":\"\",\"m\":\"\u22121,70 (prof.&nbsp;5, 1,4&nbsp;s)\",\"sf\":\"+0,83\"},{\"f\":\"5n2\/Q5pk\/2p5\/6pp\/4P1q1\/2N3P1\/PP5P\/7K b - - 0 1\",\"s\":\"Dxa7\",\"u\":\"b7a7\",\"w\":true,\"n\":37,\"c\":\"\",\"m\":\"17,0&nbsp;s\",\"sf\":\"+1,07\"},{\"f\":\"5n2\/Q5pk\/2p5\/6pp\/4P3\/2N2qP1\/PP5P\/7K w - - 0 1\",\"s\":\"Df3+\",\"u\":\"g4f3\",\"w\":false,\"n\":37,\"c\":\"\",\"m\":\"\u22121,02 (prof.&nbsp;8, 21&nbsp;s)\",\"sf\":\"+1,02\"},{\"f\":\"5n2\/Q5pk\/2p5\/6pp\/4P3\/2N2qP1\/PP5P\/6K1 b - - 0 1\",\"s\":\"Rg1\",\"u\":\"h1g1\",\"w\":true,\"n\":38,\"c\":\"\",\"m\":\"+1,89 (prof.&nbsp;8, 17&nbsp;s)\",\"sf\":\"+0,81\"},{\"f\":\"8\/Q5pk\/2p1n3\/6pp\/4P3\/2N2qP1\/PP5P\/6K1 w - - 0 1\",\"s\":\"Ce6\",\"u\":\"f8e6\",\"w\":false,\"n\":38,\"c\":\"<b>38\u2026Ce6&nbsp;?<\/b> Premi\u00e8re vraie faute de Gideon&nbsp;: +3,4 pour les Blancs.\",\"m\":\"\u22121,12 (prof.&nbsp;7, 13&nbsp;s)\",\"sf\":\"+3,35\"},{\"f\":\"8\/6pk\/2p1n3\/6pp\/4P3\/2N2qP1\/PP3Q1P\/6K1 b - - 0 1\",\"s\":\"Df2\",\"u\":\"a7f2\",\"w\":true,\"n\":39,\"c\":\"\",\"m\":\"+1,68 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"+3,50\"},{\"f\":\"8\/6pk\/2p1n3\/7p\/4P1p1\/2N2qP1\/PP3Q1P\/6K1 w - - 0 1\",\"s\":\"g4\",\"u\":\"g5g4\",\"w\":false,\"n\":39,\"c\":\"39\u2026g4 aggrave encore (+4,6).\",\"m\":\"\u22121,23 (prof.&nbsp;8, 22&nbsp;s)\",\"sf\":\"+4,58\"},{\"f\":\"8\/6pk\/2p1n3\/7p\/4P1pP\/2N2qP1\/PP3Q2\/6K1 b - - 0 1\",\"s\":\"h4\",\"u\":\"h2h4\",\"w\":true,\"n\":40,\"c\":\"40.h4&nbsp;? Le Sparc laisse passer 40.Dxf3 gxf3 41.Rf2, qui gagnait.\",\"m\":\"+1,60 (prof.&nbsp;7, 17&nbsp;s)\",\"sf\":\"+1,31\"},{\"f\":\"8\/6pk\/2p1nq2\/7p\/4P1pP\/2N3P1\/PP3Q2\/6K1 w - - 0 1\",\"s\":\"Df6\",\"u\":\"f3f6\",\"w\":false,\"n\":40,\"c\":\"<b>40\u2026Df6&nbsp;??<\/b> Gideon propose l'\u00e9change des Dames. La finale de Cavaliers qui suit est perdue&nbsp;: +5,2.\",\"m\":\"\u22121,19 (prof.&nbsp;8, 22&nbsp;s)\",\"sf\":\"+5,24\"},{\"f\":\"8\/6pk\/2p1nQ2\/7p\/4P1pP\/2N3P1\/PP6\/6K1 b - - 0 1\",\"s\":\"Dxf6\",\"u\":\"f2f6\",\"w\":true,\"n\":41,\"c\":\"41.Dxf6 gxf6. Le Sparc a un pion de plus et un pion a pass\u00e9 \u00e0 l'aile Dame.\",\"m\":\"+1,91 (prof.&nbsp;8, 17&nbsp;s)\",\"sf\":\"+5,22\"},{\"f\":\"8\/7k\/2p1np2\/7p\/4P1pP\/2N3P1\/PP6\/6K1 w - - 0 1\",\"s\":\"gxf6\",\"u\":\"g7f6\",\"w\":false,\"n\":41,\"c\":\"\",\"m\":\"\u22121,05 (prof.&nbsp;3, 0,1&nbsp;s)\",\"sf\":\"+5,26\"},{\"f\":\"8\/7k\/2p1np2\/7p\/4P1pP\/2N3P1\/PP3K2\/8 b - - 0 1\",\"s\":\"Rf2\",\"u\":\"g1f2\",\"w\":true,\"n\":42,\"c\":\"\",\"m\":\"+1,94 (prof.&nbsp;10, 17&nbsp;s)\",\"sf\":\"+5,10\"},{\"f\":\"8\/7k\/2p2p2\/2n4p\/4P1pP\/2N3P1\/PP3K2\/8 w - - 0 1\",\"s\":\"Cc5\",\"u\":\"e6c5\",\"w\":false,\"n\":42,\"c\":\"\",\"m\":\"\u22121,30 (prof.&nbsp;10, 23&nbsp;s)\",\"sf\":\"+5,26\"},{\"f\":\"8\/7k\/2p2p2\/2n4p\/4P1pP\/2N1K1P1\/PP6\/8 b - - 0 1\",\"s\":\"Re3\",\"u\":\"f2e3\",\"w\":true,\"n\":43,\"c\":\"\",\"m\":\"+2,02 (prof.&nbsp;9, 17&nbsp;s)\",\"sf\":\"+5,32\"},{\"f\":\"8\/8\/2p2pk1\/2n4p\/4P1pP\/2N1K1P1\/PP6\/8 w - - 0 1\",\"s\":\"Rg6\",\"u\":\"h7g6\",\"w\":false,\"n\":43,\"c\":\"\",\"m\":\"\u22121,41 (prof.&nbsp;10, 24&nbsp;s)\",\"sf\":\"+5,50\"},{\"f\":\"8\/8\/2p2pk1\/2n4p\/3KP1pP\/2N3P1\/PP6\/8 b - 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