Author: Erik Madsen

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Banks 89th Amateur Series Division 7

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MadChess 3.0 participated in Graham Banks’ 89th amateur tournament in division 7. 1 2 3 4 5 6 7 8 9 0 1 2 1 KnightX 3.1 64-bit **** 1100 0½11 ½11½ ½110 ½½10 1111 1111 ½½10 ½01½ ½1½1 1½11 30.5/44 2 Mantissa 2.5.0 64-bit 0011 **** 0110 ½01½ 1010 10½½ ½111 1101 1½11 ½111 ½1½1 1011 29.5/44 3 RookieMonster 1.9.4 64-bit 1½00 1001 **** ½000 1½½½ 01½1 ½1½1 1111 ½0½1 011½ 1000 1111 25.5/44 4 Lozza 2.0 64-bit ½00½ ½10½ ½111 **** 1½0½ 1010 100½ 0½11 ½½½½ ½1½½ 1½1½ ½½1½ 24.5/44 518.00 5 Supernova 2.4 64-bit ½001 0101 0½½½… Continue Reading

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Banks 88th Amateur Series Division 7

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MadChess 3.0 participated in Graham Banks’ 88th amateur tournament in division 7. 1 2 3 4 5 6 7 8 9 0 1 2 1 Delocto 200419 64-bit **** 1½½0 111½ 1001 ½001 ½½0½ 1½½1 ½½11 1111 ½11½ 1011 011½ 29.0/44 2 Nawito 2103 64-bit 0½½1 **** ½10½ 100½ 1010 11½½ ½11½ ½11½ ½½11 ½111 1011 ½1½0 28.0/44 3 Zevra 2.5 64-bit 000½ ½01½ **** 1111 ½101 1½½1 ½½0½ ½111 1½0½ 1110 1010 111½ 27.5/44 4 Drosophila 1.6 64-bit 0110 011½ 0000 **** 0110 ½111 110½ ½½10 111½ ½½½0 1½11 1111 27.0/44 5 MadChess 3.0 64-bit ½110 0101 ½010 1001… Continue Reading

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MadChess 3.1 Beta 26e5323 (Threats)

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I added evaluation of threats in the middlegame to MadChess 3.1 Beta. A bonus is given if a pawn or minor piece threatens to capture a more valuable piece on its next move. The evaluation code does not determine if the threatening piece is defended. That is left to the Search.GetQuietScore method to resolve. In other words, Search.GetQuietScore may determine the opponent can capture the threatening piece, eliminating the threat and rendering the evaluation bonus moot (because loss of a piece greatly outweighs the threat bonus). Evaluating threats increased the playing strength of MadChess 3.1 Beta by 7 Elo.  … Continue Reading

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Missed Clever Tactical Shot

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Recently I reviewed some blitz games I’ve played on Chess.com over the past few months. I found an enjoyable game where I played very well but missed a clever tactical shot near the end of the game. When reviewing the game, I recognized this position. I remember wishing, during the game, that I had more time on my clock to think and work out the tactics. On second observation, I found the killer move. MadChess, along with world-class chess engines Stockfish and Komodo Dragon, confirmed it’s the best move. Can you find it? Very nice! Here’s the full game, with… Continue Reading

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Banks 87th Amateur Series Division 6

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MadChess 3.0 participated in Graham Banks’ 87th amateur tournament in division 6. 1 2 3 4 5 6 7 8 9 0 1 2 1 Cheese 2.2 64-bit **** 0110 1110 ½½01 ½001 1½½1 1½½½ 11½1 ½111 00½1 1111 11½1 30.0/44 2 Nalwald 1.12 64-bit 1001 **** ½½1½ 0½½1 1½11 ½½½1 0½½½ ½½½½ 1½½1 ½1½½ 1½11 1011 28.0/44 3 RuyDos 1.1.11 64-bit 0001 ½½0½ **** ½010 0½1½ 1011 10½1 11½0 00½½ 1½1½ 1110 1111 25.0/44 4 Devel 3.8.4 ½½10 1½½0 ½101 **** ½000 0½0½ 000½ ½1½1 ½1½1 01½1 1½11 1111 24.5/44 5 K2 0.99 ½110 0½00 1½0½ ½111 **** 1½½1… Continue Reading