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Subject: Re: Is Your program falling in these traps (12 positions)?

Author: Robert Hyatt

Date: 15:33:19 09/25/98

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On September 25, 1998 at 16:14:32, Jeremiah Penery wrote:

>On September 23, 1998 at 13:05:18, Robert Hyatt wrote:
>
>>On September 23, 1998 at 01:18:29, Jouni Uski wrote:
>>
>>>r4rk1/5p1p/p2RbnpQ/q1p1p2P/1pP1P3/1P3P2/P1N3P1/2K2B1R b - -
>
>>>-Nxh5?
>
>>  11.           2        -         0    Likes Qxa2 from ply=2 on.
>
>
>Curiously, I ran this with Crafty 15.19 on a PII 300, and it liked Nxh5 until
>ply 12 7/32.  Evaluation is around +.57 until then, then it suddenly jumps to
>+2.57 at ply 12 3/32. At 3'47", it changes to Rfe8, with a +2.27 evaluation.  It
>doesn't even appear to consider Qxa2 at any time in the search.
>Could there be a bug here?
>
>Jeremiah Penery


No.  15.20 is simply different from 15.19... new eval terms, others
modified... search extensions somewhat changed, etc...



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