Author: James Robertson
Date: 15:29:07 03/22/99
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On March 22, 1999 at 17:06:44, Dann Corbit wrote: >I understand that you can represent a chess board as a rotated bit sets. But my >significantly stupid question is "Why rotate them -- what is the advantage?" To generate moves, you extract 8 adjacent bits from your 64-bit bitboard. This works great for rank moves since they are already perfectly lined up. But if you want to get file moves, you can't extract every 8th bit, and diagonal moves are even worse. If you rotate the bitboard, you can extract file and diagonal moves. James
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