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Subject: Re: A simple endgame

Author: Mike Byrne

Date: 13:37:42 08/03/03

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Crafty 19.04 SE

c4 in 4 seconds on my machine, winning score with 7 seconds
[d]8/8/6kp/p7/1p4P1/1P3K2/P1P5/8 w - - 0 1

New game
8/8/6kp/p7/1p4P1/1P3K2/P1P5/8 w - - 0 1

Analysis by Crafty 19.04 ST:

1.Kg2 Kf6 2.Kf2 Ke6 3.Ke3 Ke5 4.Kd3
  ²  (0.68)   Depth: 7   00:00:00  15kN
1.Kg2 Kf6 2.Kf2 Ke6 3.Ke3 Ke5 4.Kd3
  ²  (0.68)   Depth: 7   00:00:00  16kN
1.Kg2 Kf6 2.Kf2 Ke6 3.Ke3 Ke5 4.Kd3 Kf4
  ²  (0.68)   Depth: 8   00:00:00  19kN
1.Kg2 Kf6 2.Kf2 Ke6 3.Ke3 Ke5 4.Kd3 Kf4
  ²  (0.68)   Depth: 8   00:00:00  29kN
1.Kg2 Kf6 2.Kf2 Ke6 3.Kf3 Ke5 4.Ke3
  ±  (0.78)   Depth: 9   00:00:00  40kN
1.Kg2 Kf6 2.Kf2 Ke6 3.Kf3 Ke5 4.Ke3
  ±  (0.78)   Depth: 9   00:00:00  59kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kh4 Kg6 4.Kh3 Kf6 5.Kg3 Ke5
  ²  (0.48)   Depth: 10   00:00:00  95kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kh4 Kg6 4.Kh3 Kf6 5.Kg3 Ke5
  ²  (0.48)   Depth: 10   00:00:00  139kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kh4 Kg6 4.Kh3 Kf6 5.Kh2 Ke5 6.Kg3
  ²  (0.48)   Depth: 11   00:00:00  157kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kh4 Kg6 4.Kh3 Kf6 5.Kh2 Ke5 6.Kg3
  ²  (0.48)   Depth: 11   00:00:00  227kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kh4 Kg6 4.Kh3 Kf6 5.Kh2 Ke5 6.Kg3 Ke4
  ²  (0.38)   Depth: 12   00:00:00  290kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kh4 Kg6 4.Kh3 Kf6 5.Kh2 Ke5 6.Kg3 Ke4
  ²  (0.38)   Depth: 12   00:00:00  423kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.c4 bxc3 5.Ke3 Kg5 6.Kd3 c2 7.Kxc2 Kxg4
  =  (0.10)   Depth: 13   00:00:00  528kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.c4 bxc3 5.Ke3 Kg5 6.Kd3 c2 7.Kxc2 Kxg4
  =  (0.10)   Depth: 13   00:00:01  756kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.Ke3 Kg5 5.Kf3 Kg6
  =  (0.00)   Depth: 14   00:00:01  906kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.Ke3 Kg5 5.Kf3 Kg6
  =  (0.00)   Depth: 14   00:00:02  1324kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.Ke3 Kg5 5.Kf3 Kg6
  =  (0.00)   Depth: 15   00:00:02  1418kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.Ke3 Kg5 5.Kf3 Kg6
  =  (0.00)   Depth: 15   00:00:02  1907kN
1.Kg2 Kg7 2.Kg3 Kf7 3.Kf4 Kf6 4.Ke3 Kg5 5.Kf3 Kg6
  =  (0.00)   Depth: 16   00:00:03  2060kN
1.c4
  ²  (0.33)   Depth: 16   00:00:04  3280kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 h2 9.a8Q
Kf4
  +-  (2.52)   Depth: 16   00:00:07  4679kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 h2 9.a8Q
Kf4
  +-  (2.52)   Depth: 16   00:00:07  4818kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kf4 9.a8Q
Kg3
  +-  (2.75)   Depth: 17   00:00:07  5350kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kf4 9.a8Q
Kg3
  +-  (2.75)   Depth: 17   00:00:11  6235kN
1.c4
  +-  (3.08)   Depth: 18   00:00:13  6816kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
h2 10.Qh1 Kh3
  +-  (3.82)   Depth: 18   00:00:20  9003kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
h2 10.Qh1 Kh3
  +-  (3.82)   Depth: 18   00:00:24  10317kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
h2 10.Qh1 Kh3 11.Kc2
  +-  (4.07)   Depth: 19   00:00:29  11587kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
h2 10.Qh1 Kh3 11.Kc2
  +-  (4.07)   Depth: 19   00:00:38  13658kN
1.c4
  +-  (4.40)   Depth: 20   00:00:43  14868kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
Kf2 10.Qf8+ Kg1 11.Qxb4 h2 12.Qg4+ Kf2
  +-  (5.17)   Depth: 20   00:00:46  16376kN
1.c4 bxc3 2.Ke3 Kg5 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
Kf2 10.Qf8+ Kg1 11.Qxb4 h2 12.Qg4+ Kf2
  +-  (5.17)   Depth: 20   00:00:55  19789kN

(Byrne, Secane, PA USA 03.08.2003)

after forcing Ke3 - it's still a clear win for white

Byrne,M - Crafty 19.04 ST
8/8/6kp/p7/1p4P1/1P2K3/P1P5/8 b - - 0 1

Analysis by Crafty 19.04 ST:

1...Kf6 2.Kf4 Kg6 3.Kf3 Kg5 4.Kg3 Kf6 5.Kf2 Kg5 6.Kg3 h5 7.gxh5
  ²  (0.58)   Depth: 8   00:00:00  14kN
1...Kf6 2.Kf4 Kg6 3.Kf3 Kg5 4.Kg3 Kf6 5.Kf2 Kg5 6.Kg3 h5 7.gxh5
  ²  (0.58)   Depth: 8   00:00:00  16kN
1...Kf6
  =  (0.25)   Depth: 9   00:00:00  28kN
1...Kf6 2.Kf4 Kg6 3.Kf3 Kg5 4.Kg3 Kf6 5.Kf2 Kg5 6.Kg3 h5 7.gxh5
  ²  (0.26)   Depth: 9   00:00:00  33kN
1...Kf6 2.Kf4 Kg6 3.Kf3 Kf6 4.Kg2 Ke5 5.Kg3 Ke4 6.Kf2
  ²  (0.38)   Depth: 10   00:00:00  63kN
1...Kf6 2.Kf4 Kg6 3.Kf3 Kf6 4.Kg2 Ke5 5.Kg3 Ke4 6.Kf2
  ²  (0.38)   Depth: 10   00:00:00  68kN
1...Kf6 2.Kf4 Kg6 3.Kf3 Kf6 4.Kg2 Ke5 5.Kg3 Ke4 6.Kf2 Kd4
  ²  (0.38)   Depth: 11   00:00:00  130kN
1...Kf6 2.Kf4 Kg6 3.Kf3 Kf6 4.Kg2 Ke5 5.Kg3 Ke4 6.Kf2 Kd4
  ²  (0.38)   Depth: 11   00:00:00  138kN
1...Kf6 2.Kf4 Kg6 3.Kf3
  ²  (0.38)   Depth: 12   00:00:00  327kN
1...Kf6 2.Kf4 Kg6 3.Kf3
  ²  (0.38)   Depth: 12   00:00:00  338kN
1...Kf6 2.c4 bxc3 3.a3 c2 4.Kd2 Ke5 5.Kxc2 Kd4 6.a4 Kc5 7.Kc3 Kb6 8.Kd4
  +-  (1.52)   Depth: 13   00:00:01  708kN
1...Kg5 2.c4 Kxg4 3.Ke4 Kg5 4.Ke5 Kg6 5.c5 Kf7 6.Kd6 Ke8 7.c6 Kd8 8.c7+ Kc8
9.Kc6
  ±  (0.81)   Depth: 13   00:00:01  804kN
1...Kg5 2.c4 Kxg4 3.Ke4 Kg5 4.Ke5 Kg6 5.c5 Kf7 6.Kd6 Ke8 7.c6 Kd8 8.c7+ Kc8
9.Kc6
  ±  (0.81)   Depth: 13   00:00:01  804kN
1...Kg5 2.c4 Kxg4 3.Ke4 Kg5 4.Ke5 Kg6 5.c5 Kf7 6.Kd6 Ke8 7.c6 Kd8 8.c7+ Kc8
9.Kc6
  ±  (0.81)   Depth: 14   00:00:01  804kN
1...Kg5 2.c4 Kxg4 3.Ke4 Kg5 4.Ke5 Kg6 5.c5 Kf7 6.Kd6 Ke8 7.c6 Kd8 8.c7+ Kc8
9.Kc6
  ±  (0.81)   Depth: 14   00:00:01  883kN
1...Kg5 2.c4 Kxg4 3.Ke4 Kg5 4.Ke5 Kg6 5.c5 Kf7 6.Kd6 Ke8 7.c6 Kd8 8.c7+ Kc8
9.Kc6
  ±  (0.81)   Depth: 15   00:00:01  883kN
1...Kg5 2.c4 Kxg4 3.Ke4 Kg5 4.Ke5 Kg6 5.c5 Kf7 6.Kd6 Ke8 7.c6 Kd8 8.c7+ Kc8
9.Kc6
  ±  (0.81)   Depth: 15   00:00:01  1029kN
1...Kg5 2.c4 Kxg4 3.Kd4 Kg5 4.Kc5 h5 5.Kb5 h4 6.c5 h3 7.c6 h2 8.c7 h1Q 9.c8Q
Qd5+ 10.Qc5 Qf5 11.Qxf5+ Kxf5 12.Kxa5
  ±  (1.24)   Depth: 16   00:00:02  1852kN
1...Kg5 2.c4 Kxg4 3.Kd4 Kg5 4.Kc5 h5 5.Kb5 h4 6.c5 h3 7.c6 h2 8.c7 h1Q 9.c8Q
Qd5+ 10.Qc5 Qf5 11.Qxf5+ Kxf5 12.Kxa5
  ±  (1.24)   Depth: 16   00:00:03  2304kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 h2 9.a8Q Kg3
10.Qh1 Kh3
  +-  (3.82)   Depth: 17   00:00:06  3995kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 h2 9.a8Q Kg3
10.Qh1 Kh3
  +-  (3.82)   Depth: 17   00:00:08  5284kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 h2 9.a8Q Kg3
10.Qh1 Kh3 11.Kc2
  +-  (4.07)   Depth: 18   00:00:10  6460kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 h2 9.a8Q Kg3
10.Qh1 Kh3 11.Kc2
  +-  (4.07)   Depth: 18   00:00:18  9601kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
Kf2 10.Qf8+ Kg1 11.Qxb4 h2 12.Qg4+ Kf2
  +-  (5.17)   Depth: 19   00:00:22  12304kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
Kf2 10.Qf8+ Kg1 11.Qxb4 h2 12.Qg4+ Kf2
  +-  (5.17)   Depth: 19   00:00:25  13585kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
Kf2 10.Qf8+ Kg1 11.Qxb4 h2 12.Qg4+ Kf2 13.Qe4
  +-  (5.27)   Depth: 20   00:00:31  16424kN
1...Kg5 2.c4 bxc3 3.a4 Kxg4 4.b4 axb4 5.Kd3 h5 6.a5 h4 7.a6 h3 8.a7 Kg3 9.a8Q
Kf2 10.Qf8+ Kg1 11.Qxb4 h2 12.Qg4+ Kf2 13.Qe4
  +-  (5.27)   Depth: 20   00:00:33  17772kN

(Byrne, Secane, PA USA 03.08.2003)



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