Author: Robert Hyatt
Date: 14:14:16 06/27/02
Go up one level in this thread
On June 27, 2002 at 13:38:32, Ferdinand S. Mosca wrote:
>
>The king and pawn game is a very interesting exercise to program, is it
>difficult to perfect this ending?.
>
>How long will it take your favorite programs to see that 36. h5 is good for
>black.
>[D]8/k6p/8/2P2p2/2P1p3/7K/1P3P2/8 b - - 0 35
>sample program analysis on Athlon xp 1600+, 64MB hash
>Analysis by Gromit 3.8.2:
>
>36...h5 37.Kg3 Kb7 38.b3 Kc7 39.b4 Kc6 40.f4 Kc7 41.b5 Kb7 42.c6+ Kb6 43.c5+ Kc7
>44.Kh3 e3 45.Kg3 h4+ 46.Kg2 h3+ 47.Kf3
> ± (1.09) Depth: 18 00:10:55
>36...h5
> ± (1.09) Depth: 19 00:10:55
>36...h5
> ± (1.09) Depth: 19 00:11:09
>
>more than 11 min, and yet the score still favors white.
>
>
>Analysis by Green Light Chess 2.18:
>
>36...h5 37.Kg3 Kb7 38.b4 Kc6 39.f4 Kc7 40.b5 Kd7 41.c6+ Kd6 42.Kf2 h4 43.Kg2 e3
>44.Kf3 h3 45.Kxe3 h2 46.c5+ Kxc5 47.c7 Kxb5 48.c8Q h1Q 49.Qxf5+
> ± (1.27) Depth: 19 00:03:16 154355kN
>36...h5 37.Kg3 Kb7 38.b4 Kc6 39.f4 Kc7 40.b5 Kd7 41.c6+ Kd6 42.Kf2 h4 43.Kg2 e3
>44.Kf3 h3 45.Kxe3 h2 46.c5+ Kxc5 47.c7 Kxb5 48.c8Q h1Q 49.Qxf5+
> ± (1.27) Depth: 19 00:03:17 155502kN
>
>still favors white.
>
>Regards,
>Dinan
takes Crafty 1.5 seconds to lock on to the move, 5 seconds for the score
to drop below 0.00 (good for black) and 7 seconds to have a -1.5 score for
black...
12 1.11 3.41 1. ... Kb7 2. Kh4 h6 3. b4 Kc7 4. Kg3
h5 5. b5 Kb7 6. c6+ Kb6 7. Kh4 Kc7
8. Kxh5
12 1.52 ++ 1. ... h5!!
12 1.65 0.86 1. ... h5 2. Kg3 Kb7 3. b4 Kc6 4. Kh3
f4 5. Kg2 h4 6. Kh3 e3 7. Kg2 exf2
8. Kxf2
(2) 12-> 1.66 0.86 1. ... h5 2. Kg3 Kb7 3. b4 Kc6 4. Kh3
f4 5. Kg2 h4 6. Kh3 e3 7. Kg2 exf2
8. Kxf2
13 1.96 ++ 1. ... h5!!
13-> 2.21 0.47 1. ... h5 2. Kg3 Kb7 3. b4 Kc6 4. Kh3
f4 5. Kg2 h4 6. Kh3 e3 7. Kg2 exf2
8. Kxf2
14 2.93 ++ 1. ... h5!!
14 5.26 -0.28 1. ... h5 2. Kg3 Kb7 3. b4 Kc6 4. Kh3
f4 5. Kg2 h4 6. b5+ Kxc5 7. Kg1 e3
8. Kf1 exf2 9. Kxf2
15 6.42 ++ 1. ... h5!!
15 7.63 -1.58 1. ... h5 2. Kg3 Kb7 3. b3 Kc7 4. c6
Kd6 5. b4 Kxc6 6. c5 Kd5 7. b5 Kxc5
8. Kh4 Kxb5 9. Kxh5
15-> 7.93 -1.58 1. ... h5 2. Kg3 Kb7 3. b3 Kc7 4. c6
Kd6 5. b4 Kxc6 6. c5 Kd5 7. b5 Kxc5
8. Kh4 Kxb5 9. Kxh5
16 10.33 -1.87 1. ... h5 2. Kg3 Kb7 3. b3 Kc7 4. c6
Kxc6 5. b4 Kd6 6. b5 Kc5 <HT>
16-> 10.92 -1.87 1. ... h5 2. Kg3 Kb7 3. b3 Kc7 4. c6
Kxc6 5. b4 Kd6 6. b5 Kc5 <HT>
17 16.47 -1.73 1. ... h5 2. Kg3 Kb7 3. b3 Kc7 4. c6
Kxc6 5. b4 Kb7 6. b5 Kb6 7. Kh4 f4
8. c5+ Kxb5 9. c6 Kxc6 10. Kxh5
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