Author: Uri Blass
Date: 02:06:38 09/30/01
Go up one level in this thread
On September 30, 2001 at 03:45:40, Christophe Theron wrote: >On September 30, 2001 at 02:01:16, K. Burcham wrote: > >> >> >>i was trying different positions, to find the biggest come back. >>program evals are amazing and very interesting. >>here shredder5 scans the board and says white is down about 13 points, >>but soon finds that it is really a mate in 8 for white. >> >>of course you can easily see how this was done, with the material advantage. >>and i tried to tie up blacks pieces, so that the mate was still there for >>white. i am going to work on this some more, try to dig the hole a little >>deeper before the program can see the mate. >>please post the results of your program, with eval. >> >> >> [D]qbb1r1k1/nrp2p1p/n1p3p1/p1p5/P6N/1PP3RP/2BQ1PPK/8 w - - >> >> >> >> >>Engine: Shredder 5 >>by Stefan Meyer-Kahlen >> >> >> 8.02 0:00 -12.76 1.Rd3 Be6 2.Rd8 Rxd8 3.Qxd8+ Kg7 4.Bd3 Nc8 5.Bc4 Bxc4 >>6.bxc4 (207.426) 298.8 >> 9.01 0:01 -12.76 1.Rd3 Be6 2.Rd8 Rxd8 3.Qxd8+ Kg7 4.Bd3 Nc8 5.Bc4 Bxc4 >>6.bxc4 (360.297) 303.0 >> 9.04 0:01 -12.75++ 1.Qd3 Rb6 2.Nf5 Be6 3.Qe3 Bxb3 4.Rxg6+ hxg6 5.Qxe8+ Kh7 >> 9.04 0:01 -12.66 1.Qd3 Rb6 2.Nf5 Be6 3.Qe3 f6 4.Kg1 Kh8 >>5.Qe1 (588.211) 308.1 >> 10.01 0:04 -12.90 1.Qd3 Rb6 2.Nf5 Be6 3.Nh6+ Kf8 4.Re3 c4 5.bxc4 Kg7 6.Rg3 >>Kxh6 7.Qxg6+ hxg6 >> 10.02 0:05 -12.89++ 1.Qf4 Be6 2.Nf5 c4 3.Nh6+ Kf8 4.Re3 Ke7 5.Qxf7+ Kd8 >>(1.575.623) 306.6 >> 10.02 0:06 -12.71 1.Qf4 Be6 2.Nf5 c4 3.Nh6+ Kf8 4.Re3 Kg7 5.bxc4 Rb2 6.Bd3 >>(1.901.066) 307.1 >> 10.03 0:07 -12.70++ 1.Bd3 Rxb3 2.Bc4 Rb6 3.Nxg6 Rf8 4.Nxf8+ Bg4 (2.431.617) >>305.5 >> 10.03 0:08 -12.63 1.Bd3 Rxb3 2.Bc4 Ra3 3.Qb2 Rxa4 4.Bxf7+ Kxf7 5.Qb3+ Kg7 >>6.Qxa4 Re2 >> 10.07 0:09 -12.62++ 1.Re3 Be6 2.Bd3 Bxb3 3.Bxa6 f6 (2.984.977) 306.0 >> 10.07 0:10 -12.61 1.Re3 Rxe3 2.Qxe3 Be6 3.Bd3 Nc8 4.Qe2 Rxb3 5.Bxa6 Nb6 >>6.Kg1 (3.154.188) 305.5 >> 11.01 0:13 -12.63 1.Re3 Rxe3 2.Qxe3 c4 3.Qe8+ Kg7 4.Qe5+ Kf8 5.bxc4 Rb2 >>6.Be4 Rxf2 7.Qxa5 Kg8 >> 11.03 0:15 -12.62++ 1.Bd3 Rxb3 2.Bc4 Ra3 3.Qb2 Rxa4 4.Bxf7+ Kxf7 5.Qb3+ Kg7 >>6.Qxa4 Re2 >> 11.03 0:17 -12.27++ 1.Bd3 Rxb3 2.Bc4 Ra3 3.Qb2 Rxa4 4.Bxf7+ Kxf7 5.Qb3+ Kg7 >>6.Qxa4 Nb4 7 >> 11.03 1:10 -12.20 1.Bd3 Nb5 2.axb5 cxb5 3.Kg1 c6 4.Re3 Be6 5.Re1 Rd8 6.c4 >>Rbd7 7. >> 11.04 1:13 -12.19++ 1.Qf4 Be6 2.Nxg6 hxg6 3.Bxg6 fxg6 4.Rxg6+ Kh8 5.Qh4+ >>(23.128.287) >> 11.04 1:21 -11.84++ 1.Qf4 Be6 2.Nxg6 hxg6 3.Bxg6 Rxb3 4.Bxf7+ Kf8 5.Bxe6+ >>Ke7 (25.243.918) >> 11.04 2:04 -11.19 1.Qf4 Kg7 2.Bd3 Nb5 3.Be4 Rxe4 4.Qxe4 Nd6 5.Qxc6 Be6 6.Rd3 >>(38.543.603) 310.2 >> 11.09 2:08 -11.18++ 1.Qh6 Be6 2.Bxg6 Bxb3 3.Qxh7+ Kf8 4.Rd3 Re6 5.Bxf7 >>(39.694.892) 309.8 >> 11.09 2:09 -10.83++ 1.Qh6 Be6 2.Bxg6 Bxb3 3.Qxh7+ Kf8 4.Rd3 Bxa4 5.Bxf7 Re6 >>6.Bxe6 Nb4 7. >> 11.09 2:39 +M15 1.Qh6 Re4 2.Nxg6 fxg6 3.Bxe4 Bf5 4.Bxf5 Kf7 5.Bxg6+ Ke7 >>6.Qxh7+ Ke6 7.Qf7+ Kd6 8.Qf8+ Ke5 (51.889.080) 324.7 >> 12.01 2:53 +M11 1.Qh6 Re4 2.Nxg6 fxg6 3.Bxe4 Bg4 4.Bxg6 hxg6 5.Qxg6+ Kf8 >>6.Qf6+ Ke8 7.Re3+ Be6 8.Qxe6+ (58.135.661) 335.5 >> 13.01 4:01 +M9 1.Qh6 Re4 2.Nxg6 fxg6 3.Bxe4 Bg4 4.Bxg6 hxg6 5.Qxg6+ Kf8 >>6.Qf6+ Ke8 7.Rxg4 Rxb3 (90.502.337) 374.5 >> 14.01 16:52 +M8 1.Qh6 Re4 2.Nxg6 fxg6 3.Bxe4 Bg4 4.Bxg6 hxg6 5.Rxg4 Kf7 >>6.Rxg6 Rb6 7.Qh7+ Ke8 8.Rg8+ (481.887.620) 475.9 >> >> >>kburcham > > > >Tiger 14.7 (prototype) on my K6-2 450MHz, 6Mb hash table, finds a mate in 9 in >28s, then a mate in 8 in 66s. I stopped it after 3 minutes (still a mate in 8). > >On what computer was Shredder running? Are we supposed to guess? > > > Christophe faster than k6-2 450 I guess some 1500mhz based on previous posts of Burcham. The number of nodes per second support my theory. Junior7(p800) finds another mate New position qbb1r1k1/nrp2p1p/n1p3p1/p1p5/P6N/1PP3RP/2BQ1PPK/8 w - - 0 1 Analysis by Junior 7: 1.b4 cxb4 -+ (-8.31) Depth: 3 00:00:00 1.c4 Rb4 -+ (-7.52) Depth: 3 00:00:00 1.Nf3 Be6 -+ (-7.10) Depth: 3 00:00:00 1.Nf3 c4 2.Nd4 cxb3 3.Bxb3 -+ (-7.49) Depth: 6 00:00:00 1kN 1.Bd3 Rxb3 2.Bc4 Rb6 3.Re3 Be6 4.Bxe6 fxe6 -+ (-7.20) Depth: 6 00:00:00 8kN 1.Rd3! -+ (-6.80) Depth: 6 00:00:00 9kN 1.Rd3 c4 2.Rd8 Rf8 3.Rxf8+ Kxf8 4.Qd8+ Kg7 5.Qd4+ f6 6.Qxc4 -+ (-6.72) Depth: 9 00:00:00 23kN 1.Rd3 Be6 2.Rd8 Rxd8 3.Qxd8+ Kg7 4.Bd3 Nc8 5.Nf5+ Bxf5 6.Bxf5 gxf5 7.Qxc8 -+ (-6.65) Depth: 12 00:00:00 324kN 1.Bd3 Rb6 2.Bc4 Kg7 3.Qf4 Be6 4.Nf5+ Bxf5 5.Qxf5 -+ (-6.48) Depth: 12 00:00:01 803kN 1.Nxg6! -+ (-6.42) Depth: 12 00:00:01 961kN 1.Nxg6! hxg6 2.Bxg6 Re3 3.Qxe3 Be6 4.Bh7+ Kf8 5.Rg8+ Ke7 6.Qg5+ f6 7.Qg7+ Bf7 8.Qf8+ Ke6 -+ (-1.83) Depth: 12 00:00:10 7630kN 1.Nxg6! -+ (-1.53) Depth: 15 00:00:17 12714kN 1.Nxg6! hxg6 2.Bxg6 Re3 3.Qd8+ Kg7 4.fxe3 fxg6 5.Qe7+ Kh6 6.Qf6 Bg4 7.hxg4 Kh7 8.Rh3+ Kg8 9.Rh8# +- (#9) Depth: 15 00:03:39 165553kN 1.Nxg6! hxg6 2.Bxg6 Re3 3.Qd8+ Kg7 4.fxe3 fxg6 5.Qe7+ Kh6 6.Qf6 Bg4 7.hxg4 Kh7 8.Rh3+ Kg8 9.Rh8# +- (#9) Depth: 15 00:03:47 170223kN (Blass, Tel-aviv 30.09.2001) Note that it is easy to get bigger evaluation changes here is a simple example New position [D]qqb1r1k1/qrn1pp1p/qqp5/8/P6N/1PP1R2P/2BQ1PPK/8 w - - 0 1 Analysis by Junior 7: 1.a5 Qaxa5 2.Rg3+ Kh8 -+ (-27.55) Depth: 3 00:00:00 1.c4 Qd4 -+ (-27.46) Depth: 3 00:00:00 1.Bd3 Qaa5 2.Rg3+ Kh8 -+ (-26.82) Depth: 3 00:00:00 1.Bd3 Qaa5 2.Rg3+ Kh8 3.Qh6 Qxf2 4.Qxh7# -+ (-27.04) Depth: 6 00:00:00 5kN 1.Rg3+! -+ (-26.52) Depth: 6 00:00:00 11kN 1.Rg3+! Bg4 2.Qh6 f5 3.Rxg4+ Kf7 4.Qxh7+ Ke6 5.Bxf5+ Kd5 -+ (-21.64) Depth: 6 00:00:00 43kN 1.Rg3+! -+ (-21.34) Depth: 9 00:00:00 66kN 1.Rg3+! Bg4 2.Qg5+ Kh8 3.Qh6 Qd3 4.Bxd3 f5 5.Bxf5 Kg8 6.Rxg4+ Kf7 7.Qg7# +- (#7) Depth: 9 00:00:00 195kN 1.Rg3+! Bg4 2.Qg5+ Kh8 3.Qh6 Qd3 4.Bxd3 f5 5.Bxf5 Kg8 6.Rxg4+ Kf7 7.Qg7# +- (#7) Depth: 9 00:00:00 222kN (Blass, Tel-aviv 30.09.2001) Another example: in this case Junior7 found the mate in 2 at the first iteration so I had to use Deep Fritz New position [D]7k/8/5PK1/8/3pp3/1n1r1p2/2br1bpn/1q1q1qqq w - - 0 1 Analysis by Deep Fritz: 1.f7-- -+ (-71.59) Depth: 1/1 00:00:00 1.f7-- -+ (-74.00) Depth: 1/2 00:00:00 1.f7! -+ (-73.69) Depth: 2/4 00:00:00 1.f7! Bh4 +- (#2) Depth: 2/4 00:00:00 1.f7 Bh4 2.f8Q# +- (#2) Depth: 3/4 00:00:00 (Blass, Tel-aviv 30.09.2001) I could also get Junior7 evaluation at depth 1 by fixed ply depth Junior7 and here is the analysi at depth 1 Junior 7 - Blass,U 7k/8/5PK1/8/3pp3/1n1r1p2/2br1bpn/1q1q1qqq w - - 0 1 Analysis by Junior 7: 1.f7 Ng4 2.f8Q# -+ (-45.55) Depth: 1 00:00:00 1.f7 Ng4 2.f8Q# -+ (-45.55) Depth: 1 00:00:00 (Blass, Tel-aviv 30.09.2001) Uri
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