Author: Mike Byrne
Date: 19:57:12 05/28/02
Go up one level in this thread
On May 27, 2002 at 14:31:16, Bo Sjögren wrote:
>Many years ago I was outplayed for most of the game, but my opponent
>allowed me to "close the shop":
>
>[D]8/p7/6kp/1p2p3/1P2P2P/2P5/1P3K2/8 w - -
>
>White must play 1.h5+!, which I think we concluded after the game wins
>rather easily. But instead he played 1. b3?? and after 1...h5! he
>thought for five minutes, and shook his head (and my hand)...
>
>Does the current crop of engines recognise the danger? It seems CT14
>prefers 1.h5+, but is almost as happy with 1.b3 -- just a one minute
>check. Will any engine conclude that 1.b3 is indeed a draw, and how
>will it do it; by some kind of intelligence, or brute force? (I of
>course have the feeling that brute force is not enough for this type
>of problem.)
>
>/Bo S
modified crafty *plays* ...h5 in 4.1 seconds, fails high in 34 sec
[d] 8/p7/6kp/1p2p3/1P2P2P/2P5/1P3K2/8 w - - 0 1
White(1): setboard 8/p7/6kp/1p2p3/1P2P2P/2P5/1P3K2/8 w - - 0 1
White(1): analyze
end-game phase
clearing hash tables
time limit 9.36 (39.36)
nss depth time score variation (1)
starting thread 1
(4) 11-> 0.13 2.47 1. b3 h5 2. c4 Kf6 3. c5 Ke6 4. Ke3
Kd7 5. Kd3 Kc6 6. Ke3
(3) 12 0.16 2.47 1. b3 h5 2. c4 Kf6 3. c5 Ke6 4. Ke3
Kd7 5. Kd3 Kc7 6. Ke3 Kc6
(2) 12-> 0.21 2.47 1. b3 h5 2. c4 Kf6 3. c5 Ke6 4. Ke3
Kd7 5. Kd3 Kc7 6. Ke3 Kc6
13 0.25 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kc6 6. Kd2 Kb6 7. c5+ Kc6
8. Kc3 a5
(2) 13-> 0.33 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kc6 6. Kd2 Kb6 7. c5+ Kc6
8. Kc3 a5
14 0.38 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kc6 6. Kd2 Kb7 7. c5 Kc6
14-> 0.47 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kc6 6. Kd2 Kb7 7. c5 Kc6
15 0.55 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kc6 6. Kd2 Kd6 7. c5+ Kd7
8. Kc3 Kc6
(3) 15-> 0.86 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kc6 6. Kd2 Kd6 7. c5+ Kd7
8. Kc3 Kc6
(2) 16 0.96 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kd7 6. c5 Kd8 7. Kc2 Kc7
8. Kc3 Kb7 9. Kd3
(2) 16-> 1.10 2.37 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kd7 6. c5 Kd8 7. Kc2 Kc7
8. Kc3 Kb7 9. Kd3
17 1.24 2.46 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kd7 6. c5 a6 7. Kd2 Kc6
8. Kc3 Kc7 9. Kd3 Kd7
(3) 17-> 1.50 2.46 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kd7 6. c5 a6 7. Kd2 Kc6
8. Kc3 Kc7 9. Kd3 Kd7
(2) 18 1.66 2.46 1. b3 h5 2. c4 Kf6 3. Ke1 Ke6 4. Ke2
Kd6 5. Kd3 Kd7 6. c5 a6 7. Kd2 Kc6
8. Kc3 Kc7 9. Kd2 Kc6
18 4.10 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
18-> 4.58 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 <HT>
19 5.13 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 <HT>
(2) 19-> 5.74 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 <HT>
20 6.83 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 Ke6
11. Ke3
(2) 20-> 7.86 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 Ke6
11. Ke3
21 10.15 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 Ke7
11. Ke3 Ke6
(4) 21-> 16.90 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 Ke7
11. Ke3 Ke6
(3) 22 21.44 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 Ke7
11. Ke3 Ke6 12. Kd3
(3) 22-> 30.86 2.73 1. h5+ Kg5 2. Kg3 Kf6 3. b3 Ke6 4.
c4 Kd7 5. c5 Ke6 6. Kf3 Kf6 7. Ke3
Ke7 8. Kd2 Ke6 9. Ke2 Kf6 10. Kd3 Ke7
11. Ke3 Ke6 12. Kd3
23 33.97 ++ 1. h5+!!
White(1): quit
execution complete.
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