Author: Tony Werten
Date: 12:28:50 01/07/03
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On January 07, 2003 at 14:57:22, Russell Reagan wrote: >+------+------+------+------+------+------+------+------+ >| BIT0 | BIT1 | BIT2 | BIT3 | BIT4 | BIT5 | BIT6 | BIT7 | >+------+------+------+------+------+------+------+------+ >| Number of | PAWN |KNIGHT| ROOK | QUEEN| KING | >| ATTACKERS | |BISHOP| | | | >+------+------+------+------+------+------+------+------+ > >Ed, > >On your webpage you have the above diagram. I am curious what you use bits 3-7 >for. The reason I ask is because what if there are two queens and one knight >attacking a square? Then the table will look like this: I kind of guessed that Ed's tables can go wrong if there are 3 or more attacks, with one of them being a xray of a low piece through a high one. But this only matters if there are at least 2 defenders (maybe at least 3). So sometimes you include/exclude a bad/good capture (or only search it later). Not that bad if you can replace your SEE with a table lookup. Tony
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