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Subject: Re: Sac by hydra

Author: John Merlino

Date: 13:27:18 08/31/04

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On August 31, 2004 at 16:05:50, Vincent Lejeune wrote:

>
>Hydra-Chimera on the playchess server, played 23.Bg6! in 30 sec and demolished
>Shredder, how many time for your engine ?
>
>[d]2qr1k2/1b2bpp1/pp1rp2p/3nN3/1P6/P1PB1P2/2Q2BPP/3RR1K1 w - - 0 23

0:26 for CM9_SKR on an AMD 2500:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.77	1752		23.c4 Nf4 24.Be4 Rxd1 25.Rxd1
0:00	1/3	1.01	2097		23.Bc4 Nf4 24.Qh7
0:00	1/4	1.06	4529		23.Bc4 Nf4 24.Qh7 Bf6 25.Rxd6 Rxd6
					26.Qh8+ Ke7
0:00	1/5	0.41	30911		23.Bc4 Bf6 24.Bxd5 Rxd5 25.Rxd5
					Rxd5
0:00	1/5	0.67	33471		23.c4 Nf4 24.Bf1 Rxd1 25.Rxd1 Rd5
					26.Rxd5 Nxd5
0:00	1/6	0.63	76638		23.c4 Nf4 24.Bf1 Qc7 25.Rxd6 Qxd6
					26.Qh7
0:02	1/7	0.52	224226		23.c4 Nf4 24.Be4 Bxe4 25.fxe4 Kg8
					26.Kh1 Bf6 27.Rxd6 Rxd6
0:02	1/7	0.61	301232		23.Bd4 Nf4 24.Be4 Kg8 25.Bh7+ Kf8
					26.g3 f6 27.gxf4 fxe5 28.fxe5
0:04	1/8	0.52	666363		23.Bd4 Nf4 24.Be4 Kg8 25.Bxb7 Qxb7
					26.g3 Nh3+ 27.Kg2 Ng5
0:13	1/9	0.35	2652620		23.Bd4 Nf4 24.Be4 f6 25.Bxb7 Qxb7
					26.Nd3 Nxd3 27.Qxd3 e5
0:26	1/9	0.38	5943207		23.Bg6 fxg6 24.Qxg6 Kg8 25.Qf7+
					Kh7 26.c4 Nf6 27.Qg6+ Kg8 28.Rxd6
					Bxd6 29.Bxb6
0:32	1/10	0.39	7641095		23.Bg6 fxg6 24.Qxg6 Kg8 25.c4 Nf6
					26.Rxd6 Bxd6 27.Qf7+ Kh7 28.Bxb6
					Rf8
1:23	1/11	0.12	21039729	23.Bg6 fxg6 24.Qxg6 Kg8 25.c4 Nf6
					26.Qf7+ Kh7 27.Rc1 Re8 28.Qg6+
					Kg8 29.Nf7 Rc6 30.Nxh6+ Kh8

I think Shredder's 26...Nxb4 was the move that gave Hydra the advantage. The
King prefers 26...Nc7 with a draw score. 26...Nxb4 27.Rxd6 Bxd6 gets a score of
+1.24 for White.

jm



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