Author: G. R. Morton
Date: 12:08:09 03/10/00
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Correction. Black pawns on a7 and b6, not h7. I apologise. On March 10, 2000 at 13:48:10, G. R. Morton wrote: >The reason I asked about the best END game software below is the following >simple position which Junior6a and Rebel 10B surprisingly failed to evaluate >correctly on a 550MHZ (96Mg RAM) machine: > >Black : pawns at h7,b6 and h5, king at d6, rook at c7. >White : pawns at a2,b2, and d3, king at g2, rook at f7. White to move. > >The average club player can quickly see that RxR?? gives an easy win for black, >since after the exchange, black simply uses his h pawn to draw the white king >away from the queen side on which black pushes through. Both Junior6a and Reb10B >(noted for excellent positional play) can’t see this (in anything like >reasonable time). Hiarcs7.1 also want to exchange rooks for a while but then >smells a rat and chooses the correct Rf2. MchessPro7 immediately makes the >correct Rf2 (I guess due to its good endgame table base). True, black is >probably winning anyway, but should not these programs should select better? > >What does Shredder do? > >Another question: the above position is from an Estrin – Hans Berliner >correspondence game discussed in Berliner’s ‘The System’ book. The previous >black move was …Rc8-c7 to which he gives a good move exclamation, but why? >Surely not just because it tempts white with the sucker RxR. To protect his h7 >pawn (which could fall if instead Rc8-c2+ …Kg3, Rxb2 …Rxa6) since black can >always play h5 after the c2 check? None of the programs I have play this >“Rc8-c7!”. Sorry I’m not sharper, but why is this Zwischenzug Rc7 a good move? >Does Shredder, the super endgame software, play Rc7 instead of the natural Rc2+ >? Thanks.
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