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Subject: Re: Testposition - ..c4!

Author: Jihun Lee

Date: 11:26:54 02/21/03

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On February 21, 2003 at 14:08:19, bobby palacios wrote:

>Taken from game 14 of my 24 game match at game in 2.5hrs between Fritz8 and
>Shredder 7.
>
>[D] 2r3k1/pp1b1pp1/3q1n1p/2pPR3/5P2/1PNQ4/P1B3PP/7K b - - 0 23
>
>In this seemingly equal position, Fritz 8 played the nice pawn sac ..c4!  How
>many programs will play ..c4 and give black a better position.  In the game
>Fritz 8 gave itself a 3/4 pawn advantage.

Chessmaster 9000 (Utz12p) on an Athlon XP 2000+ finds it in 12 seconds and gives
black a slight edge after 20 seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.12	2919		23...Bg4 24.Nb5 Qd8 25.Nxa7
0:00	1/3	0.06	3800		23...Rd8 24.Qe2 Bg4
0:00	1/4	-0.07	9420		23...Rd8 24.h3 Re8 25.Rxe8+ Bxe8
					26.g3
0:00	1/5	0.08	24481		23...Rd8 24.Ne4 Nxe4 25.Qxe4 g6
					26.Qe2
0:00	1/5	0.05	53602		23...Kf8 24.Qe2 Bg4 25.Qb5 b6
0:00	1/6	0.00	100181		23...Kf8 24.h3 Re8 25.Qe2 Re7 26.Kg1

0:01	1/7	0.03	249782		23...Kf8 24.h3 Kg8 25.Qe2 Re8 26.Rxe8+
					Bxe8 27.Qe5
0:03	1/8	-0.02	604016		23...Kf8 24.h3 Kg8 25.Bb1 Re8 26.Ne4
					Nxe4 27.Rxe8+ Bxe8 28.Qxe4
0:07	1/9	0.06	1611090		23...Kf8 24.h3 a6 25.Ne4 Nxe4 26.Qxe4
					g6 27.Qf3 c4
0:12	1/9	0.01	2746114		23...c4 24.bxc4 Qc5 25.Ne2 Qb4
					26.a3 Qc5 27.d6 Qxc4 28.Qxc4 Rxc4
0:20	1/10	-0.37	4646252		23...c4 24.Qd4 cxb3 25.Bxb3 b5
					26.Re1 a6 27.Kg1 Bf5 28.Qe3 Qb4
0:41	1/11	-0.42	9714516		23...c4 24.bxc4 Qb4 25.Bb3 a5 26.Re3
					a4 27.Bd1 Rxc4 28.a3 Qc5
1:09	1/12	-0.51	17207225	23...c4 24.bxc4 Qb4 25.Bb3 a5 26.Re3
					a4 27.Bd1 Rxc4 28.a3 Qc5 29.g3
					Bf5 30.Nxa4 Qxd5+ 31.Qxd5 Nxd5
					32.Re8+ Kh7
2:25	1/13	-0.44	37198273	23...c4 24.bxc4 Qb4 25.Bb3 a5 26.Re3
					a4 27.Bc2 Rxc4 28.a3 Qc5 29.g3 Bf5
9:28	2/14	-0.63	148582654	23...c4 24.Qd4 b5 25.Re1 cxb3 26.Bxb3
					a5 27.Ne4 Nxe4 28.Rxe4 Rc1+ 29.Bd1
					Be6 30.Re5 g6 31.Qd2



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