Author: Uri Blass
Date: 00:35:48 11/27/01
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On November 25, 2001 at 15:14:16, Victor Fernandez wrote: >On November 25, 2001 at 13:37:09, Mike S. wrote: > >>The number of types of positions and ideas chess programs don't handle well, is >>shrinking rapidly IMO. Do you have examples? > >Hi Mike ! > >Yes, an example: an ending with few pieces . > >Kotov-Botvinnik > >8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1 > >The correct move is ...g5 !!! Few programs play this. > >Regards, > > Victor You can see that yace can find g5 in less than 2 hours(d4+ is probably also winning but g5 is more simple because after d4+ white can try to defend by Bxd4 g5 hxg5) yace was slowed down by a significant factor in the first 2 minutes Can Wchess on p800 find g5 in less than 2 hours? New position [D]8/8/4b1p1/2Bp3p/5P1P/1pK1Pk2/8/8 b - - 0 1 Analysis by Yace 0.99.56: 1...b2 2.Kxb2 = (0.05) Depth: 1 00:00:09 1...d4+ 2.Bxd4 = (-0.15) Depth: 1 00:00:09 1...Kg3 µ (-1.02) Depth: 1 00:00:09 1...Kg3 2.Be7 µ (-1.04) Depth: 2 00:00:09 1...Kg3 2.Be7 Kf3 µ (-1.09) Depth: 3 00:00:09 1...Kg3 2.Be7 Kf2 3.Bc5 µ (-1.04) Depth: 4 00:00:09 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 µ (-1.15) Depth: 5 00:00:11 2kN 1...Kg3 2.Kxb3 d4+ 3.Kc2 dxe3 4.Kd3 Kxh4 5.Kxe3 µ (-1.16) Depth: 6 00:00:14 8kN 1...Kg3 2.Bd4 Kxh4 3.Kxb3 g5 4.Kc2 g4 5.Kd3 µ (-1.13) Depth: 7 00:00:22 23kN 1...Kg3 2.Bd4 Kxh4 3.Kxb3 g5 4.Kc3 g4 5.Bf6+ Kg3 µ (-1.18) Depth: 8 00:00:52 55kN 1...Kg3 2.Kxb3 d4+ 3.Kc2 dxe3 4.Kd3 Kxh4 5.Kxe3 Kg4 6.Ke4 h4 µ (-1.18) Depth: 9 00:01:40 142kN 1...Kg3 2.Kxb3 d4+ 3.Kc2 dxe3 4.Kd3 Kxh4 5.Kxe3 Kg4 6.Ke4 h4 7.Bd4 µ (-1.19) Depth: 10 00:01:46 263kN 1...Kg3 2.Kxb3 d4+ 3.Kc2 dxe3 4.Kd3 Kxh4 5.Kxe3 Kg4 6.Ke4 h4 7.Ke5 Bc4 µ (-1.17) Depth: 11 00:01:47 699kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Kb2 Ke4 5.Bc5 Bd5 6.Kc3 Kf3 7.Bd6 Ke3 µ (-1.21) Depth: 12 00:01:48 1542kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Kb2 Ke4 5.Kc3 Bd5 6.Bg5 Kf3 7.Bc1 µ (-1.20) Depth: 13 00:01:51 2742kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Bg5+ Ke4 5.Bc1 Kf3 6.Bg5 Bc4 7.Bc1 Bd5 8.Kb4 Kg4 9.Bg5 Kf5 10.Bf4 µ (-1.19) Depth: 14 00:01:57 6281kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Bg5+ Ke4 5.Bc1 Kf3 6.Bg5 Bf7 7.Kd3 Bd5 µ (-1.20) Depth: 15 00:02:08 12766kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Bg5+ Ke4 5.Bc1 Kf3 6.Bg5 Bf7 7.Kd3 Bd5 8.Kc3 Ke4 9.Bh6 Kf5 10.Bd2 Ke4 11.Bg5 µ (-1.19) Depth: 16 00:02:30 25514kN 1...Bf7 2.Be7 µ (-1.20) Depth: 16 00:02:52 37401kN 1...Bf7 2.Bd4 Kg3 3.Bf6 d4+ 4.exd4 Kxf4 5.Bg5+ Ke4 6.Bd2 Bd5 7.Bg5 b2 8.Kxb2 Kf5 µ (-1.19) Depth: 16 00:02:56 39794kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Bg5+ Ke4 5.Bc1 Kf3 6.Bg5 Bf7 7.Kd3 Bd5 8.Kc3 Ke4 9.Bh6 Kf5 10.Bd2 Ke4 11.Bg5 µ (-1.19) Depth: 16 00:02:56 39794kN 1...Kg3 2.Be7 Kf2 3.Bc5 Bf7 µ (-1.20) Depth: 17 00:03:38 61334kN 1...Kg3 2.Be7 Kf2 3.Bc5 Bf7 4.Kd2 Kg3 5.Be7 d4 6.exd4 Kxf4 7.Kd3 Bc4+ 8.Kd2 µ (-1.20) Depth: 18 00:05:21 116323kN 1...Bf7 2.Bd4 Kg3 3.Bf6 d4+ 4.exd4 Kxf4 5.Bg5+ Ke4 6.Bf6 µ (-1.21) Depth: 18 00:05:52 132355kN 1...Bf7 2.Bd4 Kg3 3.Bf6 d4+ 4.exd4 Kxf4 µ (-1.21) Depth: 18 00:05:58 135258kN 1...Bf7 2.Kd2 Kg3 3.Be7 µ (-1.19) Depth: 19 00:09:31 247369kN 1...Kg3 2.Be7 µ (-1.20) Depth: 19 00:10:52 287027kN 1...Kg3 2.Be7 Kf2 3.Bc5 Kf3 4.Kd2 Bf7 5.Kc3 Be6 6.Kd2 µ (-1.20) Depth: 19 00:11:51 318355kN 1...Kg3 2.Be7 d4+ 3.exd4 Kxf4 4.Kd2 µ (-1.21) Depth: 20 00:21:20 605330kN 1...Kg3 2.Be7 Kg2 3.Kd2 Kf3 4.Bc5 Kg3 5.Be7 d4 6.exd4 Kxf4 7.Kc3 Ke4 8.Kd2 µ (-1.20) Depth: 21 00:39:58 1173487kN 1...d4+ 2.Bxd4 g5 3.hxg5 Bf5 4.g6 Bxg6 5.Bf6 Bf7 6.Kd2 Kg3 7.Ke2 h4 8.e4 µ (-1.21) Depth: 21 01:05:51 1919166kN 1...d4+ 2.Bxd4 g5 3.hxg5 Bf5 4.e4 Bxe4 5.f5 Bxf5 6.Kxb3 h4 7.Kc3 Kf4 8.Bf6 Be6 µ (-1.21) Depth: 21 01:13:56 2152094kN 1...g5 2.fxg5 d4+ 3.exd4 Kg3 4.g6 Kxh4 5.Ba3 Kg5 6.g7 Kg6 7.Kb4 h4 8.d5 Bxd5 9.Kc5 Kxg7 10.Kd6 µ (-1.22) Depth: 21 01:40:15 2884604kN 1...g5 2.fxg5 d4+ 3.exd4 Kg3 µ (-1.22) Depth: 21 01:40:51 2902558kN 1...g5 2.fxg5 d4+ 3.exd4 Kg3 4.g6 Kxh4 5.g7 Kg4 6.Bd6 h4 7.Kb2 h3 8.Kc3 Kf3 9.Kd3 Kg2 10.g8Q+ Bxg8 11.Kd2 -+ (-1.62) Depth: 22 02:47:20 401875kN 1...g5 2.fxg5 d4+ 3.exd4 Kg3 -+ (-1.62) Depth: 22 02:48:29 430633kN 1...g5 2.fxg5 d4+ 3.Bxd4 Kg3 4.Kd3 Kxh4 5.Ke2 Kxg5 6.Kf2 h4 7.Kg1 Bg4 8.Bb2 h3 9.Bd4 Kf5 10.Kh2 Ke4 11.Kh1 Kd3 12.Kh2 Bf5 -+ (-1.70) Depth: 23 05:17:48 113359kN 1...g5 2.fxg5 d4+ 3.Bxd4 Kg3 4.Kd3 Kxh4 5.Ke2 Kxg5 6.Kf2 h4 7.Kg1 Kf5 8.Bb2 h3 9.Bd4 Ke4 10.Kf2 Kd3 11.Bc5 b2 12.Kg1 -+ (-2.10) Depth: 24 10:07:08 3285542kN 1...g5 2.fxg5 d4+ 3.Bxd4 Kg3 -+ (-2.10) Depth: 24 10:09:57 3357941kN (Blass, Tel-aviv 27.11.2001) Uri
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