Author: Dan Ellwein
Date: 13:38:32 08/01/04
Go up one level in this thread
On August 01, 2004 at 08:21:11, martin fierz wrote: >On July 31, 2004 at 21:03:11, Dan Ellwein wrote: > >>On July 31, 2004 at 07:24:15, Mark Young wrote: >> >>>[d]3q3r/4b1k1/4P1p1/rpp2p1p/1nn2Q2/5N1P/P4PP1/RBB1R1K1 w >>>Another GM sac refuted by computers? >>> >>>This position is from... >>> >>>GM Fischer - GM Leonid Stein >>>Interzonal, Sousse 1967 >>> >>>GM Fischer played the (so called) winning move Bxf5! Annotators claim GM Fischer >>>wins easily after Bxf5! gxf5 Qg3+ Kh7 Ng5+ Bxg5 Bxg5 Qe8(or Qd3). >>> >>>For this reason GM Stein played Qf8? and lost...but Bxf5 gxf5! seems to more >>>then hold the position. Do any computers or humans disagree. >>> >>>Example line. >>>Bxf5 gxf5! Qg3+ Kh7 Ng5+ Bxg5 Bxg5 Ra3 [D]3q3r/7k/4P3/1pp2pBp/1nn5/r5QP/P4PP1/R3R1K1 w - - 0 5 >> >>here's the analysis after Ra3... >> >>P3/850 >> >>Time Depth Score Positions Moves >>---- ---- ---- ---- ---- >>0:00 1/3 2.51 1803 5.Qxa3 Qxg5 6.Qa7+ Qg7 7.Qxc5 >>0:00 1/4 2.32 4534 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.e7 Re8 >> 8.Rac1 Nd3 >>0:00 1/5 2.52 12963 5.Qxa3 Qxg5 6.Qa7+ Kh6 7.Qxc5 Rg8 >> 8.g3 >>0:00 1/6 2.52 39803 5.Qxa3 Qxg5 6.Qa7+ Kh6 7.Qxc5 Rg8 >> 8.g3 >>0:01 1/7 2.66 113304 5.Qxa3 Qxg5 6.Qa7+ Kh6 7.Qxc5 Nd3 >> 8.Qxb5 Nxe1 9.Rxe1 >>0:04 1/8 2.81 409975 5.Qxa3 Qxg5 6.Qa7+ Kh6 7.e7 Qf6 >> 8.Rad1 Qc6 9.Qd7 Qxd7 10.Rxd7 >>0:14 1/9 3.18 1257931 5.Qxa3 Nxa3 6.Bxd8 Nac2 7.Bf6 Re8 >> 8.a3 Nxe1 9.Rxe1 Nd5 10.Bb2 Rc8 >>0:40 1/10 3.50 3408997 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.Re5 c4 >> 8.Rxf5 Kg6 9.e7 Re8 10.Re5 c3 11.Kf1 >> >>1:50 1/11 3.62 9678741 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.Re5 c4 >> 8.Rxf5 Kg6 9.Rc5 Re8 10.f4 Nd3 >> 11.f5+ Kf6 >>4:01 1/12 3.47 22030168 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.Re5 c4 >> 8.Rxf5 Kg6 9.g4 h4 10.Kf1 Nd3 11.Rf7 >> c3 >>11:23 1/13 3.33 63675821 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.Re5 c4 >> 8.Rxf5 Kg6 9.g4 hxg4 10.hxg4 Rd4 >> 11.Kf1 Rxg4 12.Rf7 c3 13.Ke2 >>30:38 2/14 3.27 173765145 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.Re5 c4 >> 8.Rxf5 Kg6 9.Re5 Re8 10.Kf1 Nd3 >> 11.Re4 Rc8 12.e7 Kf7 13.Rd1 >>1:19:29 3/15 3.35 457992923 5.Qxa3 Nxa3 6.Bxd8 Rxd8 7.e7 Re8 >> 8.Rad1 Nc6 9.Rd5 Nc2 10.Re6 N2d4 >> 11.Rxc6 Nxc6 12.Rxf5 c4 13.Rxh5+ >> Kg7 14.Rxb5 Rxe7 15.Kf1 >>Dan > >are you sure you analysed the right position? following up from the game, this >looks just fine for black after e.g. 8...Kg7 i don't see anything at all for >white. definitely nothing close to +3... > >cheers > martin [D]4r3/4P1k1/8/1pp2p1p/1n6/n6P/P4PP1/3RR1K1 w - - 0 9 here's the anaylysis after 8...Kg7 P3/850 Time Depth Score Positions Moves ---- ---- ---- ---- ---- 0:00 1/3 1.79 676 9.Rd8 Kf7 10.Rxe8 Kxe8 0:00 1/3 1.79 676 9.Rd8 Kf7 10.Rxe8 Kxe8 0:00 1/4 1.74 1608 9.Rd8 Kf7 10.Re5 c4 11.Rxe8 Kxe8 12.Rxf5 Nxa2 13.Rxh5 0:00 1/5 1.71 4984 9.Rd8 Kf7 10.Re5 c4 11.Rxf5+ Kxe7 12.Rxe8+ Kxe8 0:00 1/6 1.71 12018 9.Rd8 Kf7 10.Re5 c4 11.Rxf5+ Kxe7 12.Rxe8+ Kxe8 0:00 1/7 1.60 60256 9.Rd8 Kf7 10.Re3 Rxe7 11.Rxa3 Re1+ 12.Kh2 c4 13.Kg3 0:01 1/8 1.67 103945 9.Rd8 Kf7 10.Re3 Nc4 11.Rf3 Kxe7 12.Rxe8+ Kxe8 13.Rxf5 0:02 1/9 1.92 215828 9.Rd8 Kf7 10.Re3 Nc4 11.Rf3 Kxe7 12.Rxe8+ Kxe8 13.Rxf5 Nxa2 14.Rxc5 0:03 1/10 1.92 327152 9.Rd8 Kf7 10.Re3 Nc4 11.Rf3 Kxe7 12.Rxe8+ Kxe8 13.Rxf5 Nxa2 14.Rxc5 0:08 1/11 2.24 743386 9.Rd8 Kf7 10.Re3 Rxe7 11.Rxa3 c4 12.Rh8 Re1+ 13.Kh2 Re2 14.Rxh5 Kg6 15.g4 Nxa2 16.Rxf5 0:17 1/11 2.91 1663026 9.Re3 Nac2 10.Rd8 Kf7 11.Re5 Nd4 12.Rxc5 Nbc6 13.Rxe8 Kxe8 14.g4 hxg4 15.hxg4 fxg4 0:26 2/12 2.42 2496687 9.Re3 Nac2 10.Rd8 Kf7 11.Re5 Nd4 12.Rxc5 Nbc6 13.Rdd5 Ke6 14.g4 hxg4 15.hxg4 fxg4 1:05 3/13 2.47 6541090 9.Re3 Nac2 10.Rd8 Kf7 11.Re5 Nd4 12.Rxc5 Nbc6 13.Rd6 Rxe7 14.Rdxc6 Nxc6 15.Rxf5+ Kg6 16.Rxb5 Nd4 2:15 4/14 2.47 13864050 9.Re3 Nac2 10.Rd8 Kf7 11.Re5 Nd4 12.Rxc5 Nbc6 13.Rd6 Kxe7 14.Rdxc6 Nxc6 15.Rxf5 h4 16.Rxb5 Kd6 8:52 5/15 2.36 54504889 9.Re3 Nac2 10.Rd8 Kf7 11.Re5 Nd4 12.Rxc5 Nbc6 13.Rd6 Rxe7 14.Rdxc6 Nxc6 15.Rxf5+ Kg6 16.Rxb5 Re1+ 17.Kh2 Re2 18.Rb6 32:22 6/16 2.22 197942140 9.Re3 Nac2 10.Rd8 Kf7 11.Re5 Nd4 12.Rxc5 Nbc6 13.Rxe8 Kxe8 14.f4 Kxe7 15.Kf2 Kd6 16.Rc1 Nb4 17.Rd1 yes... the score is going down, does not seem to be much here... Dan
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