Author: Uri Blass
Date: 01:59:42 12/16/01
Shredder6 blundered in the first position by 23...Rc8 with evaluation of 0.11 pawns for itself at depth 12 and Deep Fritz won the game Shredder expected 24.Qg4 and was surprised by 24.Bxh6 23...Qa7 could probably save black and yace suggest this move after long analysis and can see no problem The previous moves in the game were also blunders so practically you have 2 find move problems(find 24.Bxh6 and find 23.Bxh6 and too other problems when the target is to avoid a tactical mistakes and I did not analyze enough to get a list of the wrong possible moves that programs need to avoid) The programs in the game practically found only 24.Bxh6 when there were 3 mistakes in a row(it may be interesting to know the maximal number of tactical mostakes one after the other in a serious comp game). I analyzed with yace when I took back moves. Fritz 7a - Shredder 6 [D]1r2nrk1/1q1b1pp1/p3p2p/2bpP3/3N1B2/1B5Q/PP1R1PPP/5RK1 b - - 0 1 Analysis by Yace 0.99.56: 23...Qxb3 24.Nxb3 +- (6.09) Depth: 1 00:00:00 23...Bxd4 24.Rxd4 ² (0.33) Depth: 1 00:00:00 23...Qb6 = (-0.03) Depth: 1 00:00:00 23...Qb4 = (-0.11) Depth: 1 00:00:00 23...Nc7 = (-0.20) Depth: 1 00:00:00 23...Nc7 24.Rc1 = (-0.01) Depth: 2 00:00:00 23...Nc7 24.Rc1 Qb4 = (-0.09) Depth: 3 00:00:00 23...Nc7 24.Rc1 Qb4 25.Qh5 = (0.06) Depth: 4 00:00:00 23...Qb4 24.Nxe6 fxe6 25.Bxd5 = (0.05) Depth: 4 00:00:00 23...Qb4 24.Rfd1 Nc7 25.Qd3 = (0.00) Depth: 4 00:00:00 23...Qb4 24.Rfd1 Nc7 25.Qg4 Nb5 = (0.00) Depth: 5 00:00:00 25kN 23...a5 24.Rc1 Bxd4 25.Bxd5 = (-0.01) Depth: 5 00:00:00 25kN 23...a5 24.Qd3 a4 25.Bd1 Nc7 = (-0.04) Depth: 5 00:00:00 25kN 23...a5 24.Qd3 Bb5 25.Nxb5 Qxb5 26.Rc1 Qb4 = (0.10) Depth: 6 00:00:00 102kN 23...a5 24.Qd3 Nc7 25.Rc1 Qb4 26.a3 Qb6 = (0.11) Depth: 7 00:00:01 332kN 23...a5 24.Qd3 Nc7 25.Rc1 Qb4 26.a3 Qb6 27.Bd1 = (0.18) Depth: 8 00:00:04 1292kN 23...Qb4 24.Rfd1 Nc7 25.Qg4 g5 26.Bxg5 hxg5 27.Qxg5+ Kh8 28.Qh4+ Kg8 29.Qg3+ Kh8 30.Bxd5 = (0.17) Depth: 8 00:00:05 1292kN 23...Qb4 24.Rfd1 Nc7 25.Qg4 g5 26.Be3 Rfc8 27.Rc2 = (0.16) Depth: 8 00:00:05 1601kN 23...Qb4 24.Be3 Rb7 25.Rc1 Rc7 26.a3 Qb6 27.Rdc2 Bxd4 28.Rxc7 Bxe3 29.Qxe3 Qxe3 30.fxe3 Nxc7 31.Rxc7 = (0.24) Depth: 9 00:00:19 5835kN 23...a5 24.Qd3 Nc7 25.Rc1 Qb4 26.Rdc2 Bxd4 27.Bxh6 = (0.23) Depth: 9 00:00:23 6862kN 23...a5 24.Bc2 f5 25.b3 Qb4 26.Rfd1 Nc7 27.Qh5 Rfc8 = (0.20) Depth: 9 00:00:32 9706kN 23...Qb6 24.Rfd1 Nc7 25.Qg4 Kh8 26.Nxe6 fxe6 27.Qxe6 = (0.19) Depth: 9 00:00:38 11553kN 23...Qb6 24.Rfd1 Nc7 25.Qg4 Kh8 26.Rd3 Bb5 27.Rg3 Bd3 28.Rgxd3 Bxd4 = (0.18) Depth: 9 00:00:40 12128kN 23...Qb6 24.Rfd1 Nc7 25.Qg4 Kh8 26.Rd3 Nb5 27.Rg3 Rg8 28.Be3 Nxd4 = (0.21) Depth: 10 00:01:08 20560kN 23...Qb6 24.Rfd1 Nc7 25.Qg3 Kh8 26.Qd3 Kg8 27.Bc2 Rfc8 28.Qh7+ Kf8 29.Qh8+ Ke7 30.Qxg7 Ke8 = (0.24) Depth: 11 00:02:57 52148kN 23...Qb6 24.Rfd1 Rb7 25.Qd3 Bb5 26.Nxb5 Qxb5 27.Bc2 Qxd3 28.Bxd3 Nc7 29.Rc1 Bd4 ² (0.35) Depth: 12 00:10:52 193626kN 23...Qa7 24.Be3 Rb4 25.Rfd1 a5 26.a3 Rb7 27.Rc1 Qb6 28.Rxc5 ² (0.34) Depth: 12 00:24:33 444807kN 23...Qa7 24.Be3 Rb4 25.Rfd1 a5 26.a3 Rb7 27.Rc1 Qb6 28.Bd1 Bb5 = (0.24) Depth: 12 00:27:29 498842kN 23...Qa7 24.Be3 f5 25.Nc2 Bxe3 26.Nxe3 Qc7 27.Rfd1 Bb5 28.f4 Qc5 29.Rd4 Be2 30.R1d2 = (0.23) Depth: 13 00:40:37 733628kN 23...Qa7 24.Rfd1 a5 25.Qd3 Bxd4 26.Qxd4 Qxd4 27.Rxd4 Nc7 28.Rb1 Nb5 29.Rd3 Rfc8 30.Bd2 Ra8 31.Rd1 = (0.25) Depth: 14 01:53:15 1977757kN 23...Qa7 24.Rfd1 a5 25.Qd3 Bxd4 26.Qxd4 Qxd4 27.Rxd4 Nc7 28.Rb1 Nb5 29.Rd3 Rfc8 30.Bd2 Ra8 31.Rc1 Rxc1+ 32.Bxc1 = (0.22) Depth: 15 04:12:15 107379kN 23...Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Nb5 27.Nxb5 Rxb5 28.Qg3 Kh8 29.Ba4 Rb7 30.Bxd7 Rxd7 31.Qg4 Rc7 32.Rdc2 = (0.23) Depth: 16 13:09:22 379234kN 23...Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.25) Depth: 17 31:25:16 1122791kN (Blass, Tel-aviv 16.12.2001) Here Fritz7a blundered and played Rd2 when Bxh6 is winning a pawn(the 0.23 pawns evaluation is result of learning(yace did not finish depth 17 so it could not use the score at depth 17 for 23...Qa7) Fritz7a calculated for 7 minutes and 50 seconds in the game. Fritz 7a - Shredder 6 [D]1r2nrk1/1q1b1pp1/p3p2p/2bpP3/3N1B2/1B5Q/PP3PPP/3R1RK1 w - - 0 1 Analysis by Yace 0.99.56: 23.Nxe6 fxe6 -+ (-2.90) Depth: 1 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 1 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 1 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 1 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 1 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 1 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 3 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 3 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 4 00:00:00 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 5 00:00:00 7kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 6 00:00:00 19kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 7 00:00:00 79kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 8 00:00:01 274kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 9 00:00:06 1895kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 10 00:00:13 4446kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 11 00:01:14 22135kN 23.Rd2 Qa7 24.Rfd1 Rb4 25.Qc3 Nc7 26.Rc1 Rxd4 27.Be3 Nb5 28.Qxc5 Rxd2 29.Bxd2 Rc8 30.Qe7 Re8 31.Qh4 = (0.23) Depth: 12 00:04:11 72225kN 23.Bxh6 gxh6 24.Qxh6 Ng7 25.Rd3 Bxd4 26.Rxd4 Bb5 27.Rg4 f6 28.exf6 Bxf1 29.Rxg7+ Qxg7 30.fxg7 Bxg2 = (0.24) Depth: 12 00:06:26 114791kN 23.Bxh6 gxh6 24.Qxh6 Ng7 25.Rd3 Bxd4 26.Rxd4 Bb5 27.Rg4 f6 28.exf6 Rf7 29.fxg7 Rxg7 ² (0.63) Depth: 12 00:08:13 146682kN 23.Bxh6 Qc7 24.Bf4 a5 25.Nf3 a4 26.Bc2 g6 27.Ng5 Bxf2+ ± (1.07) Depth: 12 00:18:51 340716kN (Blass, Tel-aviv 16.12.2001) Here Shredder blundered by 22...Bc5 Yace see no problem at depth 13 with a5. It is interesting to note that shredder expected 23.Bxh6 and felt bad in the game(0.76 pawns against itself) but it did not help it to avoid 22...Bc5. Shredder used 15 minutes and 45 seconds and maybe it did not consider it important enough to finish iteration 13. Fritz 7a - Shredder 6 [D]1r2nrk1/1q1bbpp1/p3p2p/3pP3/3N1B2/1B5Q/PP3PPP/3R1RK1 b - - 0 1 Analysis by Yace 0.99.56: 22...Qxb3 23.Nxb3 +- (6.23) Depth: 1 00:00:00 22...Bc6 = (0.06) Depth: 1 00:00:00 22...Bc6 = (0.06) Depth: 1 00:00:00 22...Bc6 = (0.06) Depth: 1 00:00:00 22...Bc6 = (0.06) Depth: 1 00:00:00 22...Bb5 = (-0.01) Depth: 1 00:00:00 22...Nc7 = (-0.10) Depth: 1 00:00:00 22...Nc7 23.Qh5 = (0.05) Depth: 2 00:00:00 22...Bb5 23.Qh4 = (0.04) Depth: 2 00:00:00 22...Bb5 23.Rfe1 = (0.01) Depth: 2 00:00:00 22...Bb5 23.Nxb5 Qxb5 = (-0.14) Depth: 3 00:00:00 22...Bb5 23.Rfe1 Bb4 24.Bd2 = (0.06) Depth: 4 00:00:00 22...Bb5 23.Nxb5 Qxb5 24.Qg4 Qb4 25.Rc1 = (0.05) Depth: 5 00:00:00 14kN 22...a5 23.Qg4 a4 24.Qh3 = (0.04) Depth: 5 00:00:00 14kN 22...a5 23.Bc1 Bb5 24.Nxe6 fxe6 = (-0.04) Depth: 5 00:00:00 14kN 22...a5 23.Qd3 Bb5 24.Nxb5 Qxb5 25.Qxb5 Rxb5 = (0.14) Depth: 6 00:00:00 96kN 22...Bb5 23.Nxb5 Qxb5 24.Qxh6 gxh6 25.a4 = (0.13) Depth: 6 00:00:00 96kN 22...Bb5 23.Rfe1 Nc7 24.a4 Bd7 25.Qh5 = (0.07) Depth: 6 00:00:00 96kN 22...Bb5 23.Rfe1 Bb4 24.Bd2 Bc5 25.Qg4 h5 = (0.17) Depth: 7 00:00:01 178kN 22...Nc7 23.Qg4 Kh8 24.Bc2 Qxb2 25.Nb3 = (0.16) Depth: 7 00:00:02 445kN 22...Nc7 23.Qg4 Kh8 24.Rc1 Rfc8 25.Rfd1 Bb5 = (0.14) Depth: 7 00:00:02 445kN 22...Nc7 23.Rd3 Nb5 24.Bxh6 Nxd4 25.Rxd4 gxh6 26.Rg4+ Bg5 27.Qxh6 f6 28.exf6 ² (0.42) Depth: 8 00:00:06 1565kN 22...Bb5 23.Rfe1 ² (0.41) Depth: 8 00:00:07 1830kN 22...Bb5 23.Rfe1 Bb4 24.Re3 Bc5 25.Qg4 Bxd4 26.Rxd4 ² (0.32) Depth: 8 00:00:08 2135kN 22...Bb5 23.Rfe1 Nc7 24.Qg4 Kh8 25.Bc2 Rfc8 26.Rc1 Bc5 = (0.21) Depth: 9 00:00:19 5359kN 22...Bb5 23.Rfe1 Qb6 24.Qg4 Bb4 25.Bd2 h5 26.Qh4 Bc5 27.Nxb5 = (0.19) Depth: 10 00:00:46 13810kN 22...Bb5 23.Nxb5 Qxb5 24.Rd3 Qb4 25.Bd2 Qe4 26.Re1 Qh7 27.Rg3 Bb4 28.Rd1 = (0.25) Depth: 11 00:01:56 35415kN 22...Bb5 23.Rfe1 Bc5 24.Qg4 Kh8 25.Be3 Bb4 26.Bd2 Bc5 27.Bc2 f5 ² (0.39) Depth: 12 00:10:10 171883kN 22...a5 23.Bc2 Rc8 24.Qd3 f5 25.b3 Bc5 26.Rc1 Nc7 27.Nxe6 Nxe6 28.Be3 ² (0.38) Depth: 12 00:15:11 265941kN 22...a5 23.Bc2 Rc8 24.Qd3 f5 25.b3 Bc5 26.Rc1 Nc7 ² (0.35) Depth: 12 00:17:46 311829kN 22...Rc8 23.Rd3 a5 24.Bxh6 a4 25.Bxa4 Bxa4 26.Bxg7 Nxg7 27.Rg3 Bg5 28.b4 ² (0.34) Depth: 12 00:20:06 354562kN 22...Rc8 23.Qg4 Kh8 24.Rd3 Kg8 ² (0.35) Depth: 12 00:24:18 421033kN 22...a5 23.Bc2 Rc8 24.Qd3 f5 25.b3 Bc5 26.Rc1 Nc7 ² (0.35) Depth: 12 00:24:18 421033kN 22...a5 23.Bc2 Rc8 24.Qd3 f5 25.b3 Bc5 26.Rc1 Nc7 27.a4 Ba3 28.Rcd1 Bc5 ² (0.32) Depth: 13 00:45:34 776003kN (Blass, Tel-aviv 16.12.2001)
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