Author: Robert Hyatt
Date: 18:47:42 01/04/99
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On January 04, 1999 at 19:52:21, Dann Corbit wrote: >After having stepped through these end-games, I think that the problem is the >horizon effect. The draws are so far away, that they cannot be seen. Which >brings up an interesting question: >Do endgame tablebase files contain draw data *as well as* checkmate data, so >that when you are behind a draw could be discovered? This seems (to my feeble >way of thinking) to be just as valuable as checkmate data. If not, it seems >worthwhile to construct draw endgame tablebase files just as construction of >checkmate database files is valuable. You have to watch crafty carefully. It knows these are draws, because it has the right tablebases. But it uses a "swindle mode" that says when ahead in material, in a drawn position, pick the set of drawing moves at the root and then search them without tablebases at all, to give the opponent a chance to make a mistake.
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