Author: Grzegorz Sidorowicz
Date: 06:02:03 07/11/03
[d]8/k7/3p4/p2P1p2/P2P1P2/8/8/K7 w - -
In this legendary position my program can't find solution.
After long investigation (2 years) I must ask you ;-)
What is wrong?
I cant't find any reason?
Random numbers are good, after every move new hashcode is OK
What is wrong?! Pleas help me!!!!
Below is output from my program:
depth time nodes score variation
-------------------------------------------
1 0 2 130 a1a2
2 0 18 130 a1a2 a7a6
3 0 48 105 a1a2 a7b6 a2a1
3 0 92 109 a1b2 a7b6 b2a1
4 0 219 113 a1b2 a7b6 b2c3 b6a6
5 0 428 113 a1b2 a7b6 b2c3 b6c7 c3b3
6 0 889 114 a1b2 a7b6 b2c3 b6c7 c3c4 c7b7
7 0 1874 114 a1b2 a7b6 b2c3 b6c7 c3c4 c7b6 c4b3
8 0 4646 113 a1b2 a7b8 b2c3 b8b7
9 0 6556 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4
10 0 10236 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c2 c7b6 c2c3
11 0 14980 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c2 c7b7 c2c3
b7c7 c3d3
12 0 21712 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c2 c7b7 c2c3
b7c7 c3d3 c7b7
13 0 33043 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
14 0 43711 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
15 0 61366 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
16 0 96724 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
17 0 136639 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b6 c3c4 b6a6 c4d3 a6b6 d3c3
18 0 191476 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
19 0 271723 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
20 1 421241 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
21 2 630357 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
22 7 2460204 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
23 12 3758453 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
24 21 5496891 113 a1b2 a7b8 b2c3 b8b7 c3d3 b7c7 d3c4 c7b6 c4b3
b6c7 b3c3 c7b7
I think maybe interesting is fact when I add to my program
formula (from Crafty):
if (bestvalue!=original_alpha)
{
....Write to TT
}
my program in this position is much faster, but still can't find solution.
Below is output from version with this code:
depth time nodes score variation
-------------------------------------------
1 0 2 130 a1a2
2 0 18 130 a1a2 a7a6
3 0 48 105 a1a2 a7b6 a2a1
3 0 92 109 a1b2 a7b6 b2a1
4 0 219 113 a1b2 a7b6 b2c3 b6a6
5 0 428 113 a1b2 a7b6 b2c3 b6c7 c3b3
6 0 883 114 a1b2 a7b6 b2c3 b6c7 c3c4 c7b7
7 0 1662 114 a1b2 a7b6 b2c3 b6c7 c3c4 c7b6 c4b3
8 0 4007 113 a1b2 a7b8 b2c3 b8b7
9 0 5855 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c2
10 0 9159 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b6
11 0 11665 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
12 0 15879 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
13 0 21400 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
14 0 28444 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
15 0 43417 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
16 0 53242 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
17 0 69886 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
18 0 88844 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
19 0 110116 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
20 0 143105 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
21 0 170359 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
22 0 211740 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
23 1 261604 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
24 1 515224 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
25 2 804015 113 a1b2 a7b8 b2c3 b8b7 c3c4 b7b6 c4d3 b6c7 d3c3
c7b7
Best Regards
Grzegorz Sidorowicz
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