Author: Uri Blass
Date: 09:22:26 10/06/01
Go up one level in this thread
On October 06, 2001 at 11:44:18, Dieter Buerssner wrote: <snipped> >>I suspected that Bd7 lose material from only material evaluation and that yace >>saw positional compensation for the pawn so it chose Bd7 but I have no program >>with only material evaluation near me to verify if it is truth. > >It may still be the case, that positional compensation was seen in lines in the >search tree, and there is no contradiction. The lines that do not loose material >may be seen much worse than a pawn positionally. > >Regards, >Dieter I suspected did not mean that I was sure and I knew that I may be wrong I did some more big analysis of the game and Deep Fritz has no problem to avoid 21...h6 20...Bd7 seems not to be the best move but I guess that the big blunder is really 21...h6 and after 20...Bd7 21.Qxd5 it is better to sacrifice a pawn by 21...Bc6 22.Qa2 22...Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 26.Re4(see Deep Fritz's main line in the last iterations) I do not know which moves from the moves in the line 21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 is losing material for black. Zarkov4.5T - Yace [D]1nr1rbk1/qp1b1ppp/8/p2QPpB1/N2P4/P1R2N2/1P3PPP/4R1K1 b - - 0 1 Analysis by Deep Fritz: 21...Rxc3-- +- (1.78) Depth: 1/4 00:00:00 21...Rxc3-- +- (1.78) Depth: 1/4 00:00:00 21...Bxa4! +- (1.47) Depth: 1/4 00:00:00 21...Bxa4! µ (-1.19) Depth: 1/4 00:00:00 21...Bxa4 22.e6 fxe6 µ (-1.13) Depth: 2/12 00:00:00 21...Bxa4-- ³ (-0.53) Depth: 3/12 00:00:00 21...Bxa4-- ³ (-0.53) Depth: 3/12 00:00:00 21...Bxa4 22.Rxc8 Rxc8 23.e6 Bc2 24.exf7+ Kh8 ³ (-0.47) Depth: 4/14 00:00:00 2kN 21...Bxa4 22.e6 fxe6 23.Rxe6 Kh8 24.Rxc8 Rxc8 25.Qxf5 ³ (-0.28) Depth: 5/16 00:00:00 7kN 21...h6! ³ (-0.31) Depth: 5/21 00:00:00 29kN 21...h6! 22.Rxc8 Rxc8 23.Bxh6 ³ (-0.34) Depth: 5/21 00:00:00 34kN 21...h6-- = (-0.03) Depth: 6/19 00:00:00 40kN 21...h6-- 22.Rxc8 Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 ² (0.31) Depth: 6/22 00:00:00 64kN 21...Bxa4! ² (0.28) Depth: 6/22 00:00:00 68kN 21...Bxa4! 22.Rxc8 Rxc8 23.e6 g6 24.exf7+ Kh8 25.Bf6+ Bg7 26.Bxg7+ = (0.22) Depth: 6/22 00:00:00 78kN 21...Bxa4 22.Rxc8 Rxc8 23.e6 Bc6 24.Qxf5 f6 25.e7 ² (0.44) Depth: 7/20 00:00:00 125kN 21...h6! ² (0.41) Depth: 7/27 00:00:00 203kN 21...h6! 22.Rxc8 Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 ² (0.31) Depth: 7/27 00:00:00 244kN 21...h6 22.Rxc8 Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Bd2 Bc2 26.Bxa5 = (0.19) Depth: 8/27 00:00:00 511kN 21...h6 22.Rxc8 Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Qxf5 Bd7 26.Qg6 Nc6 ² (0.44) Depth: 9/25 00:00:01 1175kN 21...h6-- ± (0.75) Depth: 10/27 00:00:03 1985kN 21...h6-- 22.Rxc8 Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc2 27.Qxf5 ± (0.84) Depth: 10/29 00:00:04 2725kN 21...Bc6! ± (0.81) Depth: 10/30 00:00:06 4244kN 21...Bc6! 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Be3 Nxd4 26.Bxd4 Bxc5 27.Bxc5 ² (0.66) Depth: 10/30 00:00:07 4711kN 21...Bc6 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Be3 Nxd4 26.Bxd4 Bxc5 27.Bxc5 ² (0.66) Depth: 11/31 00:00:12 7818kN 21...Bc6! ² (0.34) Depth: 12/32 00:00:22 14722kN 21...Bc6! 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Qd5 Nxd4 26.Qxd4 Bxc5 27.Qd3 = (0.19) Depth: 12/32 00:00:27 18153kN 21...Bc6 22.Qb3 b5 23.Nc5 Bxf3 24.Rxf3 Nc6 25.Be3 Bxc5 26.dxc5 Rxe5 27.Rd1 ² (0.28) Depth: 13/32 00:01:10 41785kN 21...Bc6 22.Qa2 Bxf3 23.gxf3 Rxc3 24.Nxc3 Qb6 25.f4 h6 26.Bh4 Qxd4 27.e6 ² (0.44) Depth: 14/35 00:03:27 133934kN 21...Bc6 22.Qa2 h6 23.Bf4 Bxa4 24.e6 b6 25.Ne5 Kh7 26.exf7 ² (0.37) Depth: 15/37 00:09:40 388117kN 21...Bc6 22.Qa2 Bxf3 23.gxf3 Rxc3 24.Nxc3 Qb6 25.f4 h6 26.Bh4 Qxd4 27.e6 ² (0.59) Depth: 16/41 00:21:48 885416kN 21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Rxc8 Rxc8 26.Bxf4 b5 ² (0.53) Depth: 17/42 00:51:38 2131220kN 21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Rxc8 Rxc8 26.Bxf4 b5 27.Nc3 ² (0.56) Depth: 18/43 02:16:16 5650834kN 21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 26.Re4 Qd7 27.Qb3 ² (0.50) Depth: 19/48 05:47:55 14531042kN 21...Bc6 22.Qa2 Bxf3 23.gxf3 h6 24.Be3 f4 25.Bxf4 Qxd4 26.Re4 Qd7 27.Qb3 ² (0.47) Depth: 20/49 17:15:03 43600062kN (Blass, Tel-aviv 06.10.2001) After 21...h6 22.Rxc8 Zarkov4.5T - Yace [D]1nR1rbk1/qp1b1pp1/7p/p2QPpB1/N2P4/P4N2/1P3PPP/4R1K1 b - - 0 1 Analysis by Deep Fritz: 22...Rxc8! +- (4.47) Depth: 1/2 00:00:00 22...Rxc8! +- (1.59) Depth: 1/2 00:00:00 22...Rxc8! ± (1.25) Depth: 2/7 00:00:00 22...Rxc8! 23.e6 Bxe6 ² (0.62) Depth: 2/14 00:00:00 22...Rxc8 23.e6 Bxe6 ² (0.62) Depth: 3/7 00:00:00 22...Rxc8! ² (0.31) Depth: 4/10 00:00:00 1kN 22...Rxc8! 23.Bxh6 Be6 24.Qb5 gxh6 ³ (-0.34) Depth: 4/16 00:00:00 3kN 22...Rxc8-- = (-0.03) Depth: 5/16 00:00:00 9kN 22...Rxc8-- 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 ² (0.31) Depth: 5/19 00:00:00 13kN 22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 ² (0.31) Depth: 6/18 00:00:00 22kN 22...Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Bd2 Bc2 26.Bxa5 = (0.19) Depth: 7/22 00:00:00 91kN 22...Rxc8 23.e6 Bxa4 24.exf7+ Kh8 25.Qxf5 Bd7 26.Qg6 Nc6 ² (0.44) Depth: 8/23 00:00:00 183kN 22...Rxc8-- ± (0.75) Depth: 9/25 00:00:00 325kN 22...Rxc8-- 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc2 27.Qxf5 ± (0.84) Depth: 9/25 00:00:00 482kN 22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc6 27.Qxf5 Bd6 ± (0.72) Depth: 10/28 00:00:02 1532kN 22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc6 27.Qxf5 Bd6 28.Bf4 ± (0.72) Depth: 11/30 00:00:04 3169kN 22...Rxc8-- ± (1.03) Depth: 12/32 00:00:07 4747kN 22...Rxc8-- 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 Rc6 27.Qxf5 Bxa3 ± (1.06) Depth: 12/32 00:00:09 6559kN 22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 Rc6 27.Qe8 Qxb6 28.Qxf8+ ± (0.97) Depth: 13/32 00:00:26 17509kN 22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Nb6 Bxe6 26.Qxe6 Rc6 27.Qe8 Qxb6 28.Qxf8+ ± (1.00) Depth: 14/36 00:01:20 53103kN 22...Rxc8 23.e6 fxe6 24.Rxe6 Kh8 25.Qe5 Bxe6 26.Qxe6 Rc6 27.Qe8 Kg8 28.Ne5 ± (1.16) Depth: 15/35 00:03:15 131962kN (Blass, Tel-aviv 06.10.2001) Uri
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