Author: James B. Shearer
Date: 21:13:59 02/04/99
Go up one level in this thread
On January 31, 1999 at 10:43:10, Robert Hyatt wrote:
>On January 30, 1999 at 23:54:15, James B. Shearer wrote:
>
>> 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
>
>
>you must have something broken on your machine, first. I ran this on my
>PII/300 notebook, and get to ply 16 in a minute, not hours. Is your machine
>swapping/paging a lot? It takes me to depth=16 to fail high on h4, takes 2:00
>on my notebook, and 25 seconds on my quad xeon... I couldn't begin to explain
>why it would take hours to get to ply=16 there... I am at ply=17 failing high
>again after only 3 minutes on my notebook.
I think my machine is ok. I ran the position again using the annotate
command for 7200 seconds (2 hours) and the node rate stayed at 60000 same as for
a 60 second search so I don't think swapping/paging is the problem. See log
below.
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): annotate fitkp.pgn b 40-40 -1 7200
<snip moves>
Black(40): g5
Searching all legal moves.----------------------------------
end-game phase
clearing hash tables
time surplus 0.00 time limit 120:00 (120:00)
depth time score variation (1)
1 0.00 1.94 40. ... g5
1 0.01 1.96 40. ... Kg5
1-> 0.02 1.96 40. ... Kg5
2 0.03 -- 40. ... Kg5
2 0.03 0.00 40. ... Kg5
2 0.03 ++ 40. ... h4!!
2 0.04 1.57 40. ... h4 41. gxh4 Kf4
2 0.05 1.89 40. ... g5 41. Ke3
2-> 0.06 1.89 40. ... g5 41. Ke3
3 0.06 1.69 40. ... g5 41. Ke3 Kg6
3-> 0.07 1.69 40. ... g5 41. Ke3 Kg6
4 0.08 1.81 40. ... g5 41. Ke3 g4 42. h4
4-> 0.10 1.81 40. ... g5 41. Ke3 g4 42. h4
5 0.13 1.87 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7
5-> 0.15 1.87 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7
6 0.18 1.61 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Ke3
6-> 0.20 1.61 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Ke3
7 0.32 1.77 40. ... g5 41. Ke3 g4 42. h4 Kg6 43.
Kf4 Kf7
7-> 0.35 1.77 40. ... g5 41. Ke3 g4 42. h4 Kg6 43.
Kf4 Kf7
8 0.73 1.81 40. ... g5 41. Ke3 Kg6 42. Ke2 g4 43.
h4 Kf5 44. Ke3
8-> 0.77 1.81 40. ... g5 41. Ke3 Kg6 42. Ke2 g4 43.
h4 Kf5 44. Ke3
9 1.48 1.71 40. ... g5 41. Ke3 Kg6 42. Ke2 g4 43.
h4 Kf7 44. Ke3 Ke7
9-> 1.53 1.71 40. ... g5 41. Ke3 Kg6 42. Ke2 g4 43.
h4 Kf7 44. Ke3 Ke7
10 2.49 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke3 Ke7 45. b4 <HT>
10-> 2.57 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke3 Ke7 45. b4 <HT>
11 5.69 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke2 Ke7 45. Ke3 Kd7
11-> 5.81 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke2 Ke7 45. Ke3 Kd7
12 9.15 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke2 Ke7 45. Ke3 Kd7 46.
b4
12-> 9.89 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke2 Ke7 45. Ke3 Kd7 46.
b4
13 26.26 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke2 Ke7 45. Kf2 Kd7 46.
Ke3 Kc6
13-> 28.44 1.71 40. ... g5 41. Ke3 Kg6 42. Kf2 g4 43.
h4 Kf7 44. Ke2 Ke7 45. Kf2 Kd7 46.
Ke3 Kc6
14 3:10 1.72 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Ke7 48. c4
14-> 3:14 1.72 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Ke7 48. c4
15 4:57 1.71 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Kc7 48. Kf2 Kc6 49.
Ke3
15-> 5:14 1.71 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Kc7 48. Kf2 Kc6 49.
Ke3
16 11:46 1.71 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Kc7 48. Ke2 Kc6 <HT>
16-> 12:39 1.71 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Kc7 48. Ke2 Kc6 <HT>
17 53:37 1.71 40. ... g5 41. Ke3 h4 42. g4+ Kg6 43.
Ke2 Kf7 44. Kf2 Ke7 45. Ke2 Kd7 46.
Kf2 Kd8 47. Ke3 Kc7 48. Ke2 Kc6 49.
Ke3 Kd7
time=120:00 cpu=99% mat=0 n=436256725 fh=4% nps=60589
ext-> checks=49824007 recaps=1196664 pawns=18327198 1rep=14431267
predicted=0 nodes=436256725 evals=82091710
endgame tablebase-> probes done=0 successful=0 maxd=32
hashing-> trans/ref=32% pawn=1% used=w99% b99%
White(41): quit
execution complete.
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Last modified: Thu, 15 Apr 21 08:11:13 -0700
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