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[Bram Mourik]

Houdini wrote:

beram wrote: Another game where Houdini lets Komodo come away with a draw from a lost position. After game 18. move 112. ..Kf8? This time it was in game 56 [D]7Q/8/3kpPp1/8/5n2/2P2PK1/1p6/1r6 b - - 0 49 after 49. ..Rg1 it is a draw, as Stockfish very quick and Komodo rather quickly see. Deep Rybka w32 on slow laptop after 6 minutes at depth 19 switches to Nh5. Houdini 1.5a fails to find the winning move Nh5+! within reasonable time after depth 31 still it prefers Rg1 which is a draw as Komodo shows in his eval in the game.pgn just one move later after playing Kxf4 any explanations someone ? Interesting, it's another case where the "FiftyMoveDistance" option is useful. If you set it to 12, Houdini 2.0c finds Nh5! nearly immediately: Code:  12/45    0:00    -3.66    1...Rg1+ 2.Kxf4 g5+ 3.Ke3 b1Q 4.Qd8+ Ke5 5.Qd4+ Kf5 6.f7 Qc1+ 7.Qd2 Qa3 8.Kf2 Ra1 9.Kg3 Kf6 10.Qd7 Rg1+ 11.Kh3 (408.251) 3346  13/45    0:00    -3.49--   1...Rg1+ 2.Kxf4 (549.357) 3662  13/45    0:00    -3.14--   1...Rg1+ 2.Kxf4 (627.123) 3710  13/45    0:00    -2.24--   1...Rg1+ 2.Kxf4 (858.314) 4146  13/45    0:00    -2.59    1...Nh5+ 2.Kf2 Rf1+ 3.Kxf1 b1Q+ 4.Kg2 Qb7 5.Kf2 e5 6.Qf8+ Ke6 7.Qe8+ Kxf6 8.Qf8+ Kg5 9.Qd8+ Kf5 10.Qd3+ e4 11.fxe4+ Qxe4 (2.012.941) 5121  14/45    0:00    -2.46--   1...Nh5+ 2.Kf2 (2.701.993) 5361  14/45    0:00    -2.54    1...Nh5+ 2.Kf2 Rf1+ 3.Kxf1 b1Q+ 4.Kf2 Qb6+ 5.Kf1 Qa6+ 6.Ke1 Qa7 7.Kd2 e5 8.Kc2 Ke6 9.Qe8+ Kxf6 10.Qf8+ Qf7 11.Qd6+ Qe6 12.Qd8+ Qe7 13.Qb6+ Kf7 (3.899.927) 5611 Maybe I should look into using this parameter not just for analysis but also for game play... Robert

Thx, that explains it and what Vincent uttered, was not the case