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Subject: Re: Interesting position

Author: K. Burcham

Date: 08:52:40 10/18/03

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Bill, In this position it is black to move.
white is winning, so program is trying to avoid mate.
g5 is a mate in 7 at depth 12.
g3 is a mate in 10 at depth 15.
so program scores mate in 10 better.

kburcham


 [D] 1K2k3/8/6p1/P4p2/3R1Pp1/8/8/8 b - - 0 1

Chess Tiger 14.0:

1...g5 2.a6 Kf7 3.a7 gxf4 4.Rxf4 Kf6 5.a8Q Kg5 6.Rf1 Kf6
  +-  (13.54)   Depth: 10   00:00:00  239kN, tb=4
1...g5 2.fxg5 Kf7 3.a6 g3
  +-  (15.42)   Depth: 10   00:00:01  579kN, tb=23
1...g5 2.a6 Kf7 3.a7 Kf6 4.fxg5+ Kg6 5.a8Q Kh5 6.Qa6 Kxg5 7.Qa5
  +-  (15.49)   Depth: 11   00:00:02  1405kN, tb=161
1...g5 2.a6 Kf7 3.a7 Kf6 4.a8Q gxf4 5.Rd6+ Ke7 6.Qc6 Kf8 7.Rd7 g3 8.Qc8#
  +-  (#7)   Depth: 12   00:00:08  4542kN, tb=453
1...g3 2.a6 g2 3.Rd1 g5 4.a7 g1Q 5.Rxg1 g4 6.a8Q Ke7 7.Qa5 Kf6 8.Qe5+ Kg6
  +-  (17.10)   Depth: 12   00:00:12  6622kN, tb=479
1...g3 2.a6 g2 3.Rd1 g5 4.a7 g1Q 5.Rxg1 g4 6.Rxg4 Kd7 7.Rg5 Ke6 8.a8Q Kd6 9.Rxf5
  +-  (18.64)   Depth: 13   00:00:15  8445kN, tb=626
1...g3 2.a6 g2 3.Rd1 g5 4.a7 g1Q 5.Rxg1 Kd7 6.a8Q Kd6 7.fxg5 f4 8.g6 f3
  +-  (25.05)   Depth: 14   00:00:22  12367kN, tb=1182
1...g3 2.a6 g2 3.Rd1 g5 4.a7 g1Q 5.Rxg1 Kd7 6.a8Q Kd6 7.Rd1+ Kc5 8.Rd5+ Kb4
9.Qc6 gxf4 10.Rb5+ Ka3
  +-  (#10)   Depth: 15   00:00:47  25257kN, tb=3617
1...g3 2.a6 g2 3.Rd1 g5 4.a7 g1Q 5.Rxg1 Kd7 6.a8Q Kd6 7.Rd1+ Kc5 8.Rd5+ Kb4
9.Qc6 gxf4 10.Rb5+ Ka3
  +-  (#10)   Depth: 16   00:01:26  45440kN, tb=10118



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