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Subject: Re: Perft 5

Author: Alexander Kure

Date: 07:01:34 05/07/03

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On May 07, 2003 at 07:37:43, Tony Werten wrote:

[..]

>If you weren't incheck, then there is only 1 way of being in check. The
>fromsquare of the moved piece was attacked by a slider. Find the direction in
>wich to travel from the kingsquare to the from_square ( easy with 0x88) and look if there is an opponent slider on that line.

Unfortunately your rule does not cover the special case of a en-passant capture.
The captured opponent pawn can open up lines for the opponent sliding pieces
that can now attack your king.

Greetings
Alex



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