Author: John Merlino
Date: 15:44:19 02/06/03
Go up one level in this thread
On February 06, 2003 at 16:57:29, Jon Dart wrote:
>Here's a position that occurred in a recent offline test game:
>
>{D] 8/6r1/p7/1p6/3kBn1P/P2p1P2/1P6/3R1K2 b - -
>
>Ke3 is winning here, but Arasan 6.3 doesn't get this, in fact it wants to play
>Rg8. It is apparently a null move issue. If I turn off null moves, or restrict
>the null move in the case where the opponent has an advanced passer, then it is
>solved quickly.
>
>--Jon
Chessmaster 9000 chooses Ke3 in two seconds on a P3-733, and sees a nice win in
12 seconds:
Time Depth Score Positions Moves
0:00 1/3 0.00 907 1...Rc7 2.h5 Rc2
0:00 1/4 -0.18 3177 1...Rc7 2.h5 Rc2 3.h6 Rxb2
0:00 1/4 -0.25 6227 1...Rg3 2.Bb7 Rg2 3.Re1
0:00 1/5 -0.57 14042 1...Rg3 2.Ke1 Rh3 3.Bb7 Rh1+ 4.Kd2
Rh2+ 5.Kc1 Rc2+ 6.Kb1
0:00 1/6 -1.03 33975 1...Rg3 2.a4 Rh3 3.Kf2 bxa4 4.Ra1
Rh2+ 5.Kg3
0:01 1/7 -0.54 79631 1...Rg3 2.b3 Rh3 3.Kf2 a5 4.b4
Rh2+ 5.Kg3
0:02 2/8 -0.91 172963 1...Rg3 2.b3 a5 3.Kf2 Rg2+ 4.Kf1
Rh2 5.Ke1 Ng2+ 6.Kf2 Nxh4+ 7.Kg3
0:03 2/8 -1.23 276528 1...Ke3 2.h5 Rg5 3.Bg6 Nxg6 4.hxg6
Rxg6 5.a4 Rh6 6.Kg2 bxa4
0:04 3/9 -1.38 373814 1...Ke3 2.h5 Rg5 3.Bg6 Nxg6 4.hxg6
Rxg6 5.f4 Rg4 6.f5 Rf4+ 7.Ke1 Rxf5
0:12 4/10 -2.49 1009986 1...Ke3 2.h5 Rg5 3.b4 Rxh5 4.Kg1
d2 5.Bc2 Rg5+ 6.Kh1 Rg3 7.Kh2 Rxf3
0:37 5/11 -3.08 3427058 1...Ke3 2.Bxd3 Nxd3 3.a4 Rh7 4.axb5
axb5 5.Kg2 Rxh4 6.Kg3 Rb4 7.Rf1
Rxb2 8.f4
jm
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