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Subject: Re: New Endgame Test Suite

Author: Miguel A. Ballicora

Date: 16:00:44 12/03/01

Go up one level in this thread


On December 03, 2001 at 18:48:59, Dann Corbit wrote:

>On December 03, 2001 at 18:44:16, Uri Blass wrote:
>
>>On December 03, 2001 at 15:15:18, Dann Corbit wrote:
>>
>>>On December 03, 2001 at 14:42:13, Peter McKenzie wrote:
>>>[snip]
>>>>A c0?  Sorry for my ignorance, is that part of the epd standard?
>>>>Perhaps you could give me an example?  Thanks.
>>>
>>>c0 is the first comment.
>>>c1 is the second, etc.
>>>
>>>[D]4k3/1Q5Q/2q2q2/1qnqqnq1/1Qqbbq1Q/3NBN2/1Q1NBN1Q/1r1RKR1r b - - bm Nxd3+; c0
>>>"Mate in 7";
>>
>>Thanks for this position
>>It probably is going to help me to find more bugs in my move generator
>
>I am guessing it was composed by leonid.
>
>>my move generator found that perft 4=32,511,624 when yace said that it is only
>>32,511,622
>>
>>I guess that yace is right.
>>I will investigate the problem later.
>>
>>I did not know that my move generator has bugs except not generating un passant
>>moves in reply to check and generating illegal unpassant moves when the pawn is
>>not pinned and it is clearly not relevant in this case.
>
>Beowulf says:
>[1]W > setboard 4k3/1Q5Q/2q2q2/1qnqqnq1/1Qqbbq1Q/3NBN2/1Q1NBN1Q/1r1RKR1r b - -
>[1]B > perft 4
>Progress :
>......................................................................................
>Total: 32511622 Moves
>14.65 Seconds

Gaviota agrees:

perft 4
depth 0: leaves:          1 accum:          1
depth 1: leaves:         86 accum:         87
depth 2: leaves:       6189 accum:       6276
depth 3: leaves:     448732 accum:     455008
depth 4: leaves:   32511622 accum:   32966630

Miguel




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