Author: James B. Shearer
Date: 20:54:15 01/30/99
I was playing Fitter on ICC and was surprised when it let me escape with
a draw in a K and P endgame. I checked the key position afterwards with crafty
16.3 (on a 233 k6 PC). Crafty 16.3 takes 2 hours to find the winning move, h4,
at ply 16 (see log below). On the other hand crafty 15.15 finds h4 in 8 seconds
at ply 10. Fritz 4 also finds h4 in a few seconds. Looks like you may have
broken something.
James B. Shearer
hash table memory = 12M bytes.
pawn hash table memory = 2M bytes.
EGTB access enabled
using tbpath=./TB
0 piece tablebase files found
pondering disabled.
book learning disabled
result learning disabled
position learning disabled
noise level set to 0.
Crafty v16.3
White(1): in fit40
White(1): setboard 8/8/4p1p1/1p1pPk1p/p2Pp3/P1P3PP/1P2K3/8 b - - 0 40
+---+---+---+---+---+---+---+---+
8 | | | | | | | | |
+---+---+---+---+---+---+---+---+
7 | | | | | | | | |
+---+---+---+---+---+---+---+---+
6 | | | | | *P| | *P| |
+---+---+---+---+---+---+---+---+
5 | | *P| | *P| P | *K| | *P|
+---+---+---+---+---+---+---+---+
4 | *P| | | P | *P| | | |
+---+---+---+---+---+---+---+---+
3 | P | | P | | | | P | P |
+---+---+---+---+---+---+---+---+
2 | | P | | | K | | | |
+---+---+---+---+---+---+---+---+
1 | | | | | | | | |
+---+---+---+---+---+---+---+---+
a b c d e f g h
Black(1): exit
Black(1):
Black(1): analyze
end-game phase
clearing hash tables
time surplus 0.00 time limit 30.00 (3:00)
depth time score variation (1)
1 0.01 2.51 1. ... g5
1-> 0.02 2.51 1. ... g5
2 0.02 -- 1. ... g5
2 0.03 2.06 1. ... g5 2. h4
2-> 0.04 2.06 1. ... g5 2. h4
3 0.05 1.86 1. ... g5 2. Kd2 Kg6 3. h4
3-> 0.06 1.86 1. ... g5 2. Kd2 Kg6 3. h4
4 0.07 1.81 1. ... g5 2. Ke3 g4 3. h4
4-> 0.09 1.81 1. ... g5 2. Ke3 g4 3. h4
5 0.10 1.87 1. ... g5 2. Ke3 h4 3. gxh4 gxh4 4.
b4
5-> 0.13 1.87 1. ... g5 2. Ke3 h4 3. gxh4 gxh4 4.
b4
6 0.15 1.61 1. ... g5 2. Ke3 h4 3. g4+ Kg6 4. Kf2
Kf7 5. Ke3
6-> 0.18 1.61 1. ... g5 2. Ke3 h4 3. g4+ Kg6 4. Kf2
Kf7 5. Ke3
7 0.36 1.77 1. ... g5 2. Ke3 g4 3. h4 Kg6 4. Kf4
Kf7
7-> 0.58 1.77 1. ... g5 2. Ke3 g4 3. h4 Kg6 4. Kf4
Kf7
8 0.84 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke3 Ke7 6. b4 <HT>
8-> 0.88 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke3 Ke7 6. b4 <HT>
9 1.39 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke3 Ke7
9-> 1.53 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke3 Ke7
10 3.57 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Ke3
10-> 3.67 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Ke3
11 6.64 1.71 1. ... g5 2. Ke3 Kg6 3. g4 hxg4 4.
hxg4 Kf7 5. Ke2 Ke7 6. Ke3 Kd7 7. b4
11-> 7.36 1.71 1. ... g5 2. Ke3 Kg6 3. g4 hxg4 4.
hxg4 Kf7 5. Ke2 Ke7 6. Ke3 Kd7 7. b4
12 13.20 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Kd2 Kd7 7. Ke3
12-> 13.98 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Kd2 Kd7 7. Ke3
13 34.12 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Kd2 Kd7 7. Ke3 Ke7
13-> 36.71 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Kd2 Kd7 7. Ke3 Ke7
14 1:18 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Kd2 Kd7 7. Ke2 Kc6
8. Ke3
14-> 1:27 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Kd2 Kd7 7. Ke2 Kc6
8. Ke3
15 3:19 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Ke3 Kd7 7. Ke2 Kc6
8. Ke3 Kd7
15-> 39:42 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Ke3 Kd7 7. Ke2 Kc6
8. Ke3 Kd7
16 47:08 1.71 1. ... g5 2. Ke3 Kg6 3. Kf2 h4 4. g4
Kf7 5. Ke2 Ke7 6. Ke3 Kd7 7. Ke2 Kc7
8. Kd2 Kc6 9. Ke3
16 124:25 ++ 1. ... h4!!
16-> 125:32 2.10 1. ... h4
17 154:20 ++ 1. ... h4!!
17 155:59 2.50 1. ... h4 2. gxh4 Kf4 3. Kf2 e3+ 4.
Ke2 Ke4 5. Ke1 Kd3 6. Kd1 e2+ 7. Ke1
Ke3 8. h5 gxh5 9. h4 Kd3 10. b4 axb3
17-> 157:36 2.50 1. ... h4 2. gxh4 Kf4 3. Kf2 e3+ 4.
Ke2 Ke4 5. Ke1 Kd3 6. Kd1 e2+ 7. Ke1
Ke3 8. h5 gxh5 9. h4 Kd3 10. b4 axb3
18 257:03 ++ 1. ... h4!!
18-> 272:48 2.89 1. ... h4 2. gxh4 Kf4 3. Kf2 e3+ 4.
Ke2 Ke4 5. Ke1 Kd3 6. Kd1 e2+ 7. Ke1
Ke3 8. h5 gxh5 9. h4 Kd3 10. b4 axb3
Black(0): exit
Black(1):
Black(1): quit
execution complete.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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