Author: Uri Blass
Date: 22:28:08 04/27/02
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On April 28, 2002 at 01:19:27, Uri Blass wrote: >On April 27, 2002 at 18:41:28, John Merlino wrote: > >>On April 27, 2002 at 18:12:27, Uri Blass wrote: >> >>>The following position is from my last game >>> >>>[D]6k1/RR4p1/5p1p/4p3/8/P7/4rrPP/3K4 b - - 0 31 >>> >>>I played 31...Rxg2 and after 32.a4 Ra2 my opponent resigned. >>> >>> >>> >>>After the game he said that he needed one more tempo. >>> >>>I said that I was lucky because I saw the idea of Rxg7+ that almost win the game >>>only after I played 31...Rxg2. >>> >>>I played 31...Rxg2 fast because the move seemed to be almost forced(I did not >>>like the idea of Rd2+ Kc1 and the idea of Ra2 with the double mate threat is >>>gone) >>> >>>I also said in the anlaysis that the best was still 32.Rxg7+ Rxg7 33.Ra8+ >>>inspite of the fact that white is losing after 33...Kf7 34.Kxe2 Rg2+ because in >>>the worst case black will need to sacrifice the rook for the a pawn when the >>>black passed pawns are going to be srtronger than the rook. >>> >>> >>>I find that some top programs cannot find 31...Rxg2 >>>for black because they do not evaluate correctly the pawn endgame. >>> >>> >>>Uri >> >>It takes Chessmaster 9000 (pre-Beta) 2:05 on a PIII-600 to see Rxg2, but about a >>minute later it discards it for Rd2+ (which turns out to be two checking moves >>to force the White King farther away from the Black pawns BEFORE taking on g2): > >The problem is that the line that chessmaster suggests is not forced. > >31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Rxg2 34.Rxg7+ is not a forced line from white point >of view. > >White can choose 32.Ke1 > > >Uri I agree that 31...Rd2+ should also be enough to win but Rxg2 is the simplest way. Programs prefer 31...Rd2+ because they do not understand the pawn endgame. Uri
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