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Subject: Re: BitBoard challenge to Ernst A. Heinz and bitboard fans - no moderation

Author: KarinsDad

Date: 11:56:19 01/18/99

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On January 17, 1999 at 18:37:40, Vincent Diepeveen wrote:

>On January 16, 1999 at 22:23:17, Carsten Kossendey wrote:


>>>I don't doubt we all generate that quickly. Actually in DIEP i generate
>>>15 million move generations a second after 1.e4,e5 2.d4,d5 at a PII-450
>>Nice number, but what are you talking about? 15 million calls to your move
>>generator(s), 15 million legal moves, or 15 million pseudo-legal moves?
>>And are we talking about captures, quiet moves, or both?  What does "generating
>>a move" mean to you? Just say this piece attacks that square or store all the
>>nasty info like what piece is captured and how this will affect the board state
>>(e.g. castling rights, ep square, attack tables ...)

Vincent, you still haven't answered Carsten's questions.

>>Also just generating moves for the very same position over and over again is
>>of silly. You could as well have your move generator check whether the current
>>position is the same you last generated moves for, and just return a pointer to
>>the previous result in that case. That will yield much more than 15 million
>><whatever> ...
>>So why not take a position and calculate the tree size to some depth (a la
>>Crafty's "perft")?

Ditto this question. I, for one, am interested in the answers.



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