Author: Daniel Shawul
Date: 01:14:54 12/29/04
i use the same zobrist keys as the transposition tables for saving book positions. When engine is loaded all the book positions are loaded in to RAM. the problem with this method is it doesn't work very well for larger books. IIRC what crafty uses is to save 32bists of the parent hashkey and another 32bits from the child. but i think this doesn't handle transpositions?? what i am intending to do is save only the combined hashkey of the opponent pieces [excluding the player's pieces],combined with the parent hashkey. this handles most transpositions but fails at capture moves because captures change the hashkey of the opponent. If you happen to understand what i wrote above please comment. daniel
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