Author: John Merlino
Date: 15:41:28 04/27/02
Go up one level in this thread
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): Time Depth Score Positions Moves 0:00 1/3 -0.87 1338 31...Rd2+ 32.Kc1 Rxg2 33.Rxg7+ Rxg7 34.Ra8+ Rd8 35.Rxd8+ Kf7 0:00 1/4 -0.93 7582 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Rxg2 34.Rxg7+ Rxg7 35.Ra8+ Kf7 36.Kxc2 0:00 2/5 -0.90 28824 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Rxg2 34.Rxg7+ Kf8 35.Raf7+ Ke8 36.Rxg2 Rxg2 37.Rxf6 Rxh2 0:01 3/6 -0.73 86603 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Kh8 34.Rxg7 Rb2+ 35.Kc1 Rxg2 36.Rxg2 Rxg2 37.a4 Rxh2 0:03 3/6 -0.86 225940 31...Rb2 32.Rxg7+ Kf8 33.Raf7+ Ke8 34.Kc1 Rbc2+ 35.Kd1 Rfd2+ 36.Ke1 Rxg2 37.Rxg2 Rxg2 38.Rxf6 Rxh2 0:05 4/7 -0.83 457688 31...Rb2 32.Rxg7+ Kf8 33.Raf7+ Ke8 34.Kc1 Rbc2+ 35.Kd1 Rfd2+ 36.Ke1 Re2+ 37.Kd1 Rxg2 38.Rxg2 Rxg2 39.Rxf6 Rxh2 0:15 5/8 -0.34 1204088 31...Rb2 32.Rxg7+ Kf8 33.Raf7+ Ke8 34.Kc1 Rfc2+ 35.Kd1 Rd2+ 36.Kc1 Rbc2+ 37.Kb1 Rxg2 38.Rxg2 Rxg2 39.Rxf6 Rxh2 40.Re6+ Kf7 41.Rxe5 0:19 5/8 -0.56 1511740 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Kh8 34.Rxg7 Rb2+ 35.Kc1 Rfc2+ 36.Kd1 Rxg2 37.Rxg2 Rxg2 38.a4 Rxh2 39.a5 0:31 6/9 -0.83 2486814 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Kh8 34.Rxg7 Rb2+ 35.Kc1 Rfc2+ 36.Kd1 Rxg2 37.Rxg2 Rxg2 38.h4 Ra2 39.a4 f5 1:07 7/10 -0.63 5435647 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Kh8 34.Rxg7 Rb2+ 35.Kc1 Rfc2+ 36.Kd1 Rxg2 37.Rxg2 Rxg2 38.Rf7 Rxh2 39.a4 Rh1+ 40.Kd2 2:05 7/10 -0.96 10189457 31...Rxg2 32.Rxg7+ Rxg7 33.Rxg7+ Kxg7 34.Kxe2 Kf8 35.a4 Ke7 36.a5 Kd8 37.a6 Kc7 38.a7 Kb7 2:17 8/11 -1.10 11333703 31...Rxg2 32.Rxg7+ Rxg7 33.Rxg7+ Kxg7 34.Kxe2 Kf8 35.a4 Ke7 36.a5 Kd8 37.a6 Kc7 38.Ke3 Kb6 3:08 8/11 -1.29 15917885 31...Rd2+ 32.Kc1 Rc2+ 33.Kb1 Rxg2 34.Rxg7+ Rxg7 35.Rxg7+ Kxg7 36.Kxc2 Kf8 37.a4 Ke7 38.a5 Kd8 39.a6 Kc7 40.a7 Kb7 jm p.s. 34.a4 is a terrible blunder....
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