Author: Anthony Cozzie
Date: 08:49:13 09/05/03
Go up one level in this thread
On September 05, 2003 at 11:39:33, Andrey Popov wrote: >On September 05, 2003 at 11:02:07, John Merlino wrote: > >>On September 05, 2003 at 10:51:03, Andrey Popov wrote: >> >>>Look at the following position: >>>[D]6k1/3qppP1/b3p3/Pp1pP1PN/1PpP4/2P5/8/1BK5 w - - 0 1 >>>Does your engine see the victory? >> >>Chessmaster 9000, on a P4-2.4, needs a little over 2 minutes to see the win: >> >I see. 2 minutes and only 9 plies. >However, Ruffian (the same strength) could not get the positive score during >this time. What is the reason of this strange difference? >See the Ruffian log: > 6k1/3qppP1/b3p3/Pp1pP1PN/1PpP4/2P5/8/1BK5 w - - > Depth Time Score Best line > 13/28 1.24 -3.37 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Ke3 Qc8 Kf4 Qd7 Bf3 f5 gxf6 > exf6 > 13--> 1.37 -3.37 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Ke3 Qc8 Kf4 Qd7 Bf3 f5 gxf6 > exf6 > 14/28 2.18 -3.40 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 g6 Qe8 gxf7+ Qxf7 > Bd1 Qf5 Be2 Qg5+ Kc2 > 14--> 2.46 -3.40 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 g6 Qe8 gxf7+ Qxf7 > Bd1 Qf5 Be2 Qg5+ Kc2 > 15/29 3.71 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6 > Qe8 Nf4 exf6 exf6 Qf7 > 15--> 4.00 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6 > Qe8 Nf4 exf6 exf6 Qf7 > 16/35 6.52 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6 > Qe8 Nf4 exf6 exf6 Qf7 > 16--> 7.06 -3.31 Bc2 Qc6 Kd2 Qe8 Bd1 Qd8 Bc2 Qc8 Bd1 Qd7 Bc2 f5 gxf6 > Qe8 Nf4 exf6 exf6 Qf7 > 17/36 31.74 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Bc2 Qc8 > 17--> 32.68 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Bc2 Qc8 > 18/42 1:07 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Ke3 Qc8 Kf4 Qd7 Ke3 Qc6 Kd2 > Qc8 Bc2 Qe8 > 18--> 1:12 -3.31 Bc2 Qc6 Bd1 Qe8 Kd2 Qd8 Ke3 Qc8 Kf4 Qd7 Ke3 Qc6 Kd2 > Qc8 Bc2 Qe8 > 19/42 1:53 -- Bc2 > 19/43 3:28 -3.88 Bc2 Bc8 Bd1 Qd8 Kd2 Bd7 Bg4 Be8 Ke2 f5 exf6 Bxh5 > Bxh5 exf6 gxf6 Qxf6 Be8 Kxg7 Bxb5 e5 > 19--> 3:43 -3.88 Bc2 Bc8 Bd1 Qd8 Kd2 Bd7 Bg4 Be8 Ke2 f5 exf6 Bxh5 > Bxh5 exf6 gxf6 Qxf6 Be8 Kxg7 Bxb5 e5 > 20/43 4:26 -- Bc2 > 20/45 8:05 -4.31 Bc2 Qd8 Bd1 Bc8 Kd2 Bd7 Bg4 Be8 Ke2 f5 exf6 Bxh5 > Bxh5 exf6 gxf6 Qxf6 > 20/45 9:46 x.xx Kd2 > >> >>Chessmaster 9000, on a P4-2.4, needs a little over 2 minutes to see the win: >> >>Time Depth Score Positions Moves >>0:00 1/8 -5.65 44032 1.Bc2 Qe8 2.Bd1 Qc8 3.Bc2 Qd8 4.g6 >> f5 5.Nf4 >>0:00 2/9 -5.65 57399 1.Bc2 Qe8 2.Bd1 Qc8 3.Bc2 Qd8 4.g6 >> f5 5.Nf4 >>0:00 3/10 -5.55 121321 1.Bc2 Qe8 2.Bd1 Qc8 3.Bc2 Qd8 4.g6 >> f5 5.Nf4 Qc8 >>0:01 4/11 -5.60 237325 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Be2 >> Qe8 5.Bg4 Qb8 6.g6 >>0:02 5/12 -5.52 590781 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4 >> Qc6 5.Ke3 Qc8 6.Nf4 Qa8 >>0:04 6/13 -5.56 1254718 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4 >> Qc6 5.Ke3 Qc8 6.Kd2 Qd8 7.Nf4 >>0:15 7/14 -5.45 3909511 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4 >> Kh7 5.Ke3 Bb7 6.Kf3 Bc6 7.Kf2 Kg8 >> 8.Bf3 >>0:36 8/15 -5.46 8880617 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4 >> Kh7 5.Ke3 Bb7 6.Be2 Kg8 7.Kd2 Bc6 >> 8.Bf3 >>1:58 9/16 -5.35 28593195 1.Bc2 Qe8 2.Bd1 Qc8 3.Kd2 Qa8 4.Bg4 >> Kh7 5.Ke3 Qc6 6.Be2 Kg8 7.Bg4 Qc8 >> 8.Kd2 Qa8 >>2:17 9/16 4.09 35256466 1.Nf6+ exf6 2.gxf6 Qe8 3.Kd2 Qd8 >> 4.Ke3 Qxa5 5.bxa5 b4 6.cxb4 Bb5 >> 7.Kd2 Ba6 8.Bc2 Bb5 9.Kc3 Ba6 >>2:21 10/17 4.89 36413121 1.Nf6+ exf6 2.gxf6 Qe8 3.Kd2 Qd8 >> 4.Ke3 Qxf6 5.exf6 Bc8 6.Kf4 Bb7 >> 7.Kg5 e5 8.dxe5 d4 9.cxd4 c3 10.Bc2 >>2:51 11/18 5.27 48709448 1.Nf6+ exf6 2.gxf6 Qe8 3.Kd2 Qb8 >> 4.Ke3 Qxe5+ 5.dxe5 Bb7 6.Kd4 Bc6 >> 7.Kc5 Ba8 8.Kxb5 Bb7 9.Kb6 Ba8 >> 10.b5 d4 11.Ka7 >> >>jm the position is a null move killer. anthony
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