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Subject: Re: Can any program find the sacrafice

Author: John Merlino

Date: 13:58:28 02/10/05

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On February 10, 2005 at 16:42:06, Joel Martus wrote:

>[D] r2q1rk1/pp2bppp/2np1n2/2p1p2b/2B1P1P1/2NP1N1P/PPPB1P2/R2Q1RK1 b - g3 0 10
>move to find is f6-g4

CM9_R1 finds the move in 1:21 on an AMD 2500, but the score is not very
convincing:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.13	870		10...Bg6 11.g5 Nd7 12.Nd5
0:00	1/4	0.87	2588		10...Bg6 11.g5 Nd7 12.Nd5 Nb6
0:00	1/4	0.59	4634		10...Nxg4 11.hxg4 Bxg4 12.Be3 Nd4
					13.Bxd4 cxd4
0:00	1/5	0.81	13144		10...Nxg4 11.hxg4 Bxg4 12.Be3 Nb4
					13.Nd5 Nxc2
0:00	1/6	0.73	32415		10...Nxg4 11.hxg4 Bxg4 12.Be3 Nb4
					13.Bb3 Qd7 14.Nd5 Nxd5 15.Bxd5
0:00	1/6	0.32	39225		10...Bg6 11.g5 Nd7 12.Nd5 Nb6 13.Qe2
					Nxc4 14.dxc4
0:00	1/7	0.32	94422		10...Bg6 11.g5 Nd7 12.Nd5 Nb6 13.Qe2
					Nxc4 14.dxc4
0:02	1/8	0.31	443934		10...Bg6 11.Nh4 a6 12.Nxg6 hxg6
					13.f4 b5 14.Bd5 Qc7 15.Qf3
0:05	1/9	0.10	1121575		10...Bg6 11.Nh4 Nd4 12.Nxg6 hxg6
					13.g5 Nd7 14.h4 Nb6 15.Nd5 Nxd5
					16.Bxd5
0:08	1/10	0.30	1776745		10...Bg6 11.Nh4 Na5 12.Nxg6 hxg6
					13.g5 Nd7 14.Bb5 Bxg5 15.Nd5 Nc6
0:19	1/11	0.21	4288654		10...Bg6 11.Nh4 Na5 12.Nxg6 hxg6
					13.Qf3 a6 14.Rfe1 Nc6 15.Be3 Nd4
					16.Bxd4 cxd4
0:43	1/12	0.24	9939820		10...Bg6 11.Nh4 Na5 12.f4 Nxc4
					13.dxc4 exf4 14.Nxg6 hxg6 15.Bxf4
					Qd7 16.Qd3 Rac8 17.Kg2
1:21	1/12	0.12	19646582	10...Nxg4 11.hxg4 Bxg4 12.Be3 Kh8
					13.Kh1 f5 14.Rg1 Bh5 15.exf5 Qc8
					16.Bd5 Qxf5 17.Rg3 Rac8
2:43	1/13	0.24	40973597	10...Nxg4 11.hxg4 Bxg4 12.Be3 Kh8
					13.Kh1 f5 14.Rg1 Qd7 15.Rxg4 fxg4
					16.Nh2 Nd4 17.Nd5 Bh4 18.Bxd4 cxd4
					19.Qxg4 Qxg4 20.Nxg4 Bxf2

I also suspect that The King might give up on the move at later depths.

jm



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