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Subject: Re: an interesting bug in my move generator

Author: Gian-Carlo Pascutto

Date: 10:03:47 01/01/02

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On December 31, 2001 at 21:06:49, Heiner Marxen wrote:

>On December 31, 2001 at 17:07:31, Uri Blass wrote:
>
>>My program had problems with WAC 250 so I decided to ask it to calculate the
>>perft function and found that it cannot calculate perft 4 correctly
>>
>>The bug is that my program believed that double check from 2 rook directions is
>>impossible
>>
>>Here is the position of WAC 250
>>[D]1b5k/7P/p1p2np1/2P2p2/PP3P2/4RQ1R/q2r3P/6K1 w - - 0 1
>>
>>When I asked my program to calculate perft it failed in perft 4.
>>
>>My program did not count correctly the number of moves after
>>1.a5 Ng8 hxg8Q+
>>

Sjeng: perft 4
Raw nodes for depth 4: 1353197
Time : 0.93

Sjeng: perft 5
Raw nodes for depth 5: 40590029
Time : 11.97

Are these numbers correct?

--
GCP

• Re: an interesting bug in my move generator Heiner Marxen 10:25:44 01/01/02
  • Re: an interesting bug in my move generator Uri Blass 11:36:48 01/01/02
  • Re: an interesting bug in my move generator David Rasmussen 11:30:46 01/01/02
    • Re: an interesting bug in my move generator Uri Blass 11:46:20 01/01/02
      • Re: an interesting bug in my move generator Heiner Marxen 13:02:12 01/01/02
        • Re: an interesting bug in my move generator Dann Corbit 14:48:46 01/01/02
          • Re: an interesting bug in my move generator Dann Corbit 16:30:50 01/01/02

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