Author: Jon Dart
Date: 07:50:08 08/21/02
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>In my case I have a half/half approach, most of the 64 bit stuff, like the >update of the rotated bitboards (and I believe also the hashkeys) I push onto a >stack (which IS faster in my case). The rest I unmake(). I also save some of the state on the stack and restore it this way, but not all of it. Copying all the board state during undo is slower (in my case it is 64 ints for the board, plus several bitboards and status variables). --Jon
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