Author: KarinsDad
Date: 15:09:03 05/01/00
Go up one level in this thread
On May 01, 2000 at 16:26:25, Laurence Chen wrote: >On May 01, 2000 at 01:54:30, Ernst Walet wrote: > >>On April 30, 2000 at 10:46:55, Harald Faber wrote: >> >>>This position is a nice test of endgame knowledge for programs: >>> >>>Which program(s) avoid 1.Bxh7?? g5+!! 2.hxg6+ Kg7 3.Rg8+ Kh6 and draw, white has >>>no chance to enter the black fortress. >>> >>>[D]7R/5kpp/8/7P/4BK2/8/8/3r4 w - - am Be4h7;bm Kf4e5 Kf4g3;id >>>Sax-Kovacevic,Sarajewo 1982; >> >>This is what Fritz6a analyses overnight after making the moves above. >> >>[D]6R1/7B/6Pk/8/5K2/8/8/3r4 w - - 0 1 >> >>Still it sees a win for white. Can you line out how the draw is achieved? >> >>Ernst. >>snip >Easy question to answer, just remove the White pawn from the above position, and >the Tablebases (5 men) will give a score of 0.00. If White cannot win by >removing the pawn, it clearly shows that all Black has to do is to prevent the >pawn from promoting, and give perpetual check.... Easy draw... :) >Laurence Yes, but are you sure that all positions that are 5 man TBs as draws cannot be won with an additional pawn for the side with more material? A program could not "drop the pawn" and be assured of a draw in any given position. Hence, how do you code such a position? KarinsDad :)
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