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Subject: Re: Crafty Bug?

Author: Slater Wold

Date: 16:02:40 08/14/02

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On August 14, 2002 at 15:52:06, Uri Blass wrote:

>On August 14, 2002 at 10:52:13, Slater Wold wrote:
>
>>On August 14, 2002 at 10:00:59, Uri Blass wrote:
>>
>>>Interesting because Junior7 on my system could
>>>not see it in a reasonable time.
>>>
>>>Uri
>>
>>Perhaps I was going through the game or something, and it had it hashed or
>>something.
>>
>>I could be wrong.
>
>Maybe
>
>Here is what Junior7 can see without learning from hash tables
>(P850 64 mbytes hash)
>It needs more than 5 hours to find b2.
>
>
>New position
>[D]8/8/3pR1P1/2k5/8/1p1b4/7K/8 b - - 0 1
>
>Analysis by Junior 7:
>
>1...b2 2.g7 Bh7 3.Re1 b1Q 4.Rxb1
>  µ  (-1.10)   Depth: 3   00:00:00
>1...b2 2.g7 Bh7 3.Re1 b1Q 4.Rxb1
>  µ  (-1.10)   Depth: 6   00:00:00  1kN
>1...b2 2.g7 Bh7 3.Re1 Kd4 4.Rb1 Kc3 5.Kg3
>  ²  (0.29)   Depth: 9   00:00:00  54kN
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 9   00:00:00  61kN, tb=3
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 12   00:00:00  81kN, tb=23
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 15   00:00:01  802kN, tb=285
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 17   00:00:10  8955kN, tb=1077
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 19   00:00:55  51656kN, tb=6118
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 20   00:05:18  285869kN, tb=33775
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 21   00:14:24  781406kN, tb=90209
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 22   00:43:12  2155604kN, tb=234682
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 23   01:59:43  1803862kN, tb=578615
>1...Bxg6 2.Rxg6
>  =  (0.00)   Depth: 24   05:15:30  206232kN, tb=1376772
>1...b2!
>  ³  (-0.30)   Depth: 24   05:21:38  533477kN, tb=1438679
>
>(blass, tel-aviv 14.08.2002)


W,S - Deep Junior 7
8/8/3pR1P1/2k5/8/1p1b4/7K/8 b - - 0 1

Analysis by Deep Junior 7:

1...b2 2.g7 Bh7 3.Re1 b1Q 4.Rxb1
  µ  (-1.10)   Depth: 3   00:00:00
1...b2 2.g7 Bh7 3.Re1 b1Q 4.Rxb1
  µ  (-1.10)   Depth: 6   00:00:00  1kN
1...b2 2.g7 Bh7 3.Re1 Kd4 4.Rb1 Kc3 5.Kg3
  ²  (0.29)   Depth: 9   00:00:00  55kN, tb=1
1...Bxg6 2.Rxg6
  =  (0.00)   Depth: 9   00:00:00  59kN, tb=5
1...Bxg6 2.Rxg6
  =  (0.00)   Depth: 12   00:00:00  82kN, tb=42
1...Bxg6 2.Rxg6
  =  (0.00)   Depth: 15   00:00:00  758kN, tb=415
1...b2 2.g7 Bh7 3.Re1 Kd4 4.Rg1 Kc3 5.Kg3 d5 6.Rb1
  =  (0.01)   Depth: 15   00:00:05  18192kN, tb=3404
1...b2 2.g7 Bh7 3.Re1 Kd4 4.Rg1 Kc3 5.Kg3 d5 6.Rb1 Kc2
  =  (-0.15)   Depth: 17   00:00:11  36908kN, tb=8900

(W,  14.08.2002)

Probably something to do with tablebases.



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