Author: John Merlino
Date: 22:19:20 05/31/03
Go up one level in this thread
On May 31, 2003 at 14:16:29, Brian Katz wrote: >You may appreciate this next position. It is Black to move. White's last move >was Ke4... ?? >[D]8/6k1/2p2p2/p1p5/P1PpKPPp/1P5P/8/8 b Chessmaster 9000 has no problem finding f5+ in this position: Time Depth Score Positions Moves 0:00 4/8 -1.30 7076 1...f5+ 2.gxf5 Kf6 3.b4 cxb4 4.Kxd4 Kxf5 5.Ke3 b3 0:00 5/9 -2.59 16073 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 Ke5 5.f6 Kxf6 6.Kf4 d3 7.Ke3 0:00 6/10 -2.59 29228 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 Ke5 5.f6 Kxf6 6.Kf4 d3 7.Ke3 0:00 7/11 -2.40 55055 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 Ke5 5.f6 Kxf6 6.Kf4 Ke7 7.Ke4 Kd6 8.Kd3 0:00 8/12 -2.54 94589 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 Ke5 5.f6 Kxf6 6.Kf4 Ke7 7.Ke4 Kd6 8.Kd3 Ke5 0:00 9/13 -2.54 166539 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 Ke5 5.f6 Kxf6 6.Kf4 Ke7 7.Ke4 Kd6 8.Kd3 Ke5 0:01 10/14 -2.60 309521 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 Ke5 5.f6 Kxf6 6.Kf4 Ke7 7.Kf3 Ke6 8.Ke2 Ke5 9.Kd3 0:02 11/15 -2.42 668718 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 Kf6 4.f5 d3 5.Kf3 Kxf5 6.Ke3 d2 7.Kxd2 Kf4 8.Ke2 Kg3 9.Kf1 Kxh3 10.Kg1 Kg3 0:04 12/16 -2.81 1271704 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 d3 4.Kf3 Kg6 5.Ke3 Kf5 6.Kxd3 Kxf4 7.Ke2 Kg3 8.Kf1 Kxh3 9.Kg1 Kg3 10.Kh1 h3 0:09 13/17 -2.71 2421542 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 d3 4.Kf3 Kg6 5.Ke3 Kf5 6.Kxd3 Kxf4 7.Ke2 Kg3 8.Kf1 Kxh3 9.Kg1 Kg3 10.Kh1 h3 11.Kg1 0:21 14/18 -2.81 5047882 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 d3 4.Kf3 Kg6 5.Ke3 Kf5 6.Kxd3 Kxf4 7.Ke2 Kg3 8.Kf1 Kh2 9.Kf2 Kxh3 10.Kg1 Kg3 11.Kh1 h3 0:51 15/19 -3.26 11964799 1...f5+ 2.Kf3 fxg4+ 3.Kxg4 d3 4.Kf3 Kg6 5.Ke3 Kf5 6.Kxd3 Kxf4 7.Ke2 Ke4 8.Kf1 Kd3 9.Kf2 Kc2 10.Ke3 Kxb3 11.Kd3 Kxa4 12.Ke4 >[D]8/5p2/1kp5/p1p5/P1PpKPPp/1P5P/8/8 b >Many masters do not realize at first that Black can win with ...f5 in this >position. > >See how long CM 9000 takes to find this move, and realize that it is winning >very big. Fritz finds it right away, but it takes a good few minutes before it >knows it is winning very big. This one definitely takes a long time, even on my P4-2.4. At depth 19, there is a monster fail-low that takes over ten minutes to resolve. Finally, after a little less than eleven minutes, The King chooses f5+.... Time Depth Score Positions Moves 0:00 7/11 0.43 33352 1...Kc7 2.g5 Kd7 3.f5 Ke7 4.Kd3 Kf8 5.f6 Kg8 6.Ke4 Kf8 0:00 7/11 0.31 38839 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kf8 6.Ke4 Ke7 7.Kd3 0:00 8/12 0.19 48385 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kf8 6.Ke4 Ke7 7.Kd3 Kd6 0:00 9/13 0.29 79973 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kf8 6.f6 Ke8 7.Ke2 Kd7 8.Kd3 0:00 10/14 0.00 127554 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kd6 6.Kf4 0:00 11/15 0.00 199639 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kd6 6.Kf4 0:01 12/16 0.00 347590 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kd6 6.Kf4 0:02 13/17 0.00 675223 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kd7 6.Kf4 Kd6 7.Ke4 Ke7 8.Kf3 0:08 14/18 0.00 2077528 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kf8 6.Ke2 Ke7 7.Kd3 Kd6 8.Ke4 Ke7 9.Kf3 0:26 15/19 0.00 6116564 1...Kb7 2.g5 Kc7 3.f5 Kd6 4.Kf4 Ke7 5.Kf3 Kf8 6.Ke2 Ke7 7.Kd3 Kd6 8.Ke4 Ke7 9.Kf3 10:56 15/19 -1.79 137485954 1...f5+ 2.gxf5 Kc7 3.f6 Kd7 4.f5 Ke8 5.f7+ Kxf7 6.Kf3 Kf6 7.Kf4 d3 8.Ke3 Kxf5 9.Kxd3 Kf4 10.Ke2 Kg3 11.Ke3 Kxh3 12.Ke4 18:33 16/20 -1.51 233733116 1...f5+ 2.gxf5 Kc7 3.f6 Kd7 4.f5 Ke8 5.f7+ Kxf7 6.Kd3 Kf6 7.Ke4 Kg5 8.Ke5 d3 9.f6 d2 10.f7 d1=Q 11.f8=Q Qd4+ 12.Ke6 Qe3+ 13.Kd6 Qxh3 14.Qg7+ Kh5 15.Qe5+ Kg6 16.Qe4+ Kg5 jm
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