Author: Dan Ellwein
Date: 18:03:11 07/31/04
Go up one level in this thread
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!. here's the analysis after Ra3... P3/850 Time Depth Score Positions Moves 4:12:43 2/14 2.36 1240838800 1.Bxf5 gxf5 2.Qg3+ Kh7 3.Bg5 Rg8 4.Rad1 Qe8 5.Rd7 Rg7 6.Qf4 Nc6 7.Qxf5+ Qg6 8.Qxg6+ Kxg6 9.Bxe7 Nxe7 10.Ne5+ Nxe5 11.Rxe5 ---- ---- ---- ---- ---- 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
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