Author: Uri Blass
Date: 19:27:17 03/06/02
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On March 06, 2002 at 19:18:16, Slater Wold wrote: >Hyatt said in an earlier post that TB's don't take into account the ability to >castle because it would be a waste. > >However, when I feed this position into any engine, it solves it in 0.00 as a TB >win. > >[D]5Q1Q/5Q1Q/5Q1Q/5Q1Q/8/6P1/6k1/4KR1R w K - Your FEN is wrong and we need to imagine that all the white queens that you copied from dann corbit's post are missing. > >It shows 20 possible moves, all from TB's I am guessing. > >I cannot cut and paste the eval, because there isn't one, but I have: <snipped> >1.+ - (#4) Rf4 This is not correct and the program that you use has bugs. It should not call tablebases in a position that is not in the tablebases(castling is legal) >_Several_ of these moves take castling into accout. > >After Rf4 Kxg3 my TB's show 28 moves. The first move is 1. + - (#2) O-O, the >last is 28. + - (#15) Rh8. > >I am 100% sure TB's do indeed take castling into consideration. No You do not understand how tablebases work. There are no moves in tablebases. The engine generates all the legal moves and looks in the tablebases after these moves to see distance to mate. If castling is legal then the engine looks at the tablebases to see the distance to mate after castling in order to see the mate in 2 score. Uri
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