Speedup + Cleanup #250
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Speedup + Cleanup #250
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A ~10% speedup of perft achieved by reducing branching, not updating hash while taking back moves (the final hash is retrieved from history array), and using ^ for both updates in MovePiece, allowing smarter code than using ^ for unsetting and | for setting.
A lot of cosmetic code refactoring.
ELO | 2.20 +- 3.36 (95%)
SPRT | 8.0+0.08s Threads=1 Hash=32MB
LLR | 2.99 (-2.94, 2.94) [-3.00, 1.00]
Games | N: 20368 W: 5138 L: 5009 D: 10221
http://chess.grantnet.us/test/5325/