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Subject: Re: perft results (how accurate is accurate enough ?)

Author: Andreas Guettinger

Date: 14:44:25 09/23/04

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On September 23, 2004 at 16:58:33, Roman Hartmann wrote:

>hello all,
>
>while testing my move generator (10x12 array, only legal moves) and comparing
>the perft result from Crafty and my own results I noticed that my results differ
>for some positions a bit. As the results start to differ only at some depth it's
>not that easy to track this bug. Although I'm quite certain that the problem is
>somehow related to EP-moves I wasn't able to solve this riddle yet.
>
>By searching the web I found some websites with perft results from other chess
>engines with numbers even more off than the results from my move generator.
>
>some results -total nodes- from my move generator (proper Results from Crafty):
>rnbqkbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBQKBNR w KQkq - 0 1
>perft 4: 20603 ok
>perft 5: 5072212 ok

perft 5: nodes: 4865609

This is the starting position, right?
Your Crafty version must be broken.

regards
Andy



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