Author: Dann Corbit
Date: 13:43:15 12/05/03
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On December 05, 2003 at 14:18:27, Georg v. Zimmermann wrote: >Hi, > >just had a little idea and was wondering whether anyone of you is doing that. >When in check there are obviously two ways to generate moves, either flip >through all pieces and see whether they can capture attacker/ move in between, >or flip through the in-between squares and see whether pieces can move there. >Now usually b) will be faster. But in some positions when the attacker is far >aways from the king and few pieces are left, a) will be faster. I wonder if >someone has 2 versions and uses a) or b) depending on the board situation ? It >is an insignificant gain in an insignificant function, I know. But still ... I have a bitmap of every square (whether occupied by white or black) that is attacked by white, and also every square (whether occupied by white or black) that is attacked by black. Incheck(white) is just kingbitmap[white] & blackattacks Incheck(black) is just kingbitmap[black] & whiteattacks It's also useful for other things like move ordering.
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