Author: Robert Hyatt
Date: 21:16:54 08/05/01
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On August 05, 2001 at 10:25:46, Pham Minh Tri wrote: >Hi all, >Some my questions as I start my EGTBs: >1) What have I to do when there are more pieces than I need (for probing EGTB)? >For example, I have table of KBNK, but an endgame is KBNPK. Give the "redundant" >pieces for opponent? No. You only probe after a capture move, and only when the capture takes to you to a number of pieces you know you have tables for. IE if you only have 3-4 piece tables, you only probe after a capture takes you to 4 or fewer pieces. >2) I see that index for EGTB is not simple, so why do we not apply the same >technique as opening book: use hashkey? I guess one of the reasons is to save >space for TBs - use halves of them. But I think we could reverse the board, >re-calculate the new hashkey to match the TBs again? Or do I miss something? > >Many thanks for any help. >Pham You don't want to _search_ 2 gigabyte files. EGTBs compute an index that takes you directly to the game result for that configuration of pieces. No searching whatsoever. The opening book is not _nearly_ that efficient.
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