Author: William Bryant
Date: 14:04:13 02/28/00
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I am curious, do you hash a different constant for each of the 16 possible ep squares, or simply a single constant if ep is possible. I have sixteen different values that are XOR'ed into the hash signature depending on which square is the ep square. It is intersting that Bruce made a comment about this a while back. He noted that the same opening position reached by a different order of moves will produce a different hash signature doing ep squares in this way. Therefore it does create a degree of inefficiency because (except for the ep move) the rest of the position may have already been evaluated and in the hash table. William wbryant@ix.netcom.com
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