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Subject: Re: a mistake in the gcp test suite(ECM 1945) Rf3 is another solution

Author: Gian-Carlo Pascutto

Date: 08:47:29 11/13/02

Go up one level in this thread


On November 13, 2002 at 10:24:44, Uri Blass wrote:

>The line 1...Rf3 2.exf3 gxf3+ 3.Qxf3 Rxf3 4.Kxf3 Nxg3 is forced and
>after it 5.dxe5 is not the best move.
>I expect programs that use singular extensions like Deep Sjeng to find 1...Rf3
>after a long search.

Actually, it's found instantly, but is later replaced by Bxh4

Position:  0 1
  2.01	 0:00 	+1.80--	1...Qf5 (226)
  2.09	 0:00 	+1.86 	1...exd4 2.Kh1 (580)
  2.22	 0:00 	+2.10 	1...c5 2.d5 (921)
  3.01	 0:00 	+1.60--	1...c5 (1.566)
  3.02	 0:00 	+1.87 	1...exd4 2.Bxd4 c5 3.h5 (2.836)
  3.42	 0:00 	+1.87 	1...exd4 2.Bxd4 c5 3.h5 (5.730)
  4.01	 0:00 	+1.84 	1...exd4 2.Nxd4 c5 3.Nc6 (7.766)
  4.42	 0:00 	+1.84 	1...exd4 2.Nxd4 c5 3.Nc6 (12.745)
  5.01	 0:00 	+1.53 	1...exd4 2.Nxd4 c5 3.Nc6 Bf6 4.Kh1 Bxb2 (18.526) 182.0
  5.42	 0:00 	+1.53 	1...exd4 2.Nxd4 c5 3.Nc6 Bf6 4.Kh1 Bxb2 (42.564) 175.9
  6.01	 0:00 	+1.53 	1...exd4 2.Nxd4 c5 3.Nc6 Bf6 4.Kh1 Bxb2 (58.769) 170.2
  6.42	 0:00 	+1.53 	1...exd4 2.Nxd4 c5 3.Nc6 Bf6 4.Kh1 Bxb2 (123.482) 235.9
  7.01	 0:00 	+1.18 	1...exd4 2.Bxd4 Bf6 3.Bxf6 Rxf6 4.Rf1 c6 5.Kg1 (317.786)
232.5
  7.02	 0:01 	+1.79 	1...Rf3 2.exf3 gxf3+ 3.Kf1 Qxg3 4.Rd2 Qh3+ 5.Ke1 f2+ 6.Bxf2
Qh1+ 7.Qf1 Qxf1+ 8.Kxf1 Nxd2+ 9.Ke2 Nxc4 (403.444) 341.3
  7.42	 0:01 	+1.79 	1...Rf3 2.exf3 gxf3+ 3.Kf1 Qxg3 4.Rd2 Qh3+ 5.Ke1 f2+ 6.Bxf2
Qh1+ 7.Qf1 Qxf1+ 8.Kxf1 Nxd2+ 9.Ke2 Nxc4 (541.845) 365.1
  8.01	 0:01 	+2.29++	1...Rf3 (751.182) 363.1
  8.01	 0:03 	+2.89 	1...Rf3 2.exf3 gxf3+ 3.Qxf3 Rxf3 4.Kxf3 Nxg3 5.Kf2 Qg4 6.h5
Nxh5 7.Kf1 Ng3+ 8.Kg2 (1.642.269) 384.6
  8.42	 0:04 	+2.89 	1...Rf3 2.exf3 gxf3+ 3.Qxf3 Rxf3 4.Kxf3 Nxg3 5.Kf2 Qg4 6.h5
Nxh5 7.Kf1 Ng3+ 8.Kg2 (1.832.412) 458.5
  9.01	 0:05 	+3.39++	1...Rf3 (2.312.923) 457.4
  9.01	 0:06 	+3.53 	1...Rf3 2.exf3 gxf3+ 3.Qxf3 Rxf3 4.Kxf3 Nxg3 5.dxe5 Bxh4
6.Rd4 Bg5 7.Kxg3 Bxc1+ 8.Rg4 (3.141.713) 458.2
  9.42	 0:08 	+3.53 	1...Rf3 2.exf3 gxf3+ 3.Qxf3 Rxf3 4.Kxf3 Nxg3 5.dxe5 Bxh4
6.Rd4 Bg5 7.Kxg3 Bxc1+ 8.Rg4 (3.864.469) 482.3
 10.01	 0:14 	+3.41 	1...Rf3 2.exf3 gxf3+ 3.Qxf3 Rxf3 4.Kxf3 Nxg3 5.dxe5 dxe5
6.Bh2 e4+ 7.Ke3 Nf5+ 8.Kf2 Bxh4+ 9.Kf1 c6 (7.362.775) 481.7
 10.02	 0:20 	+4.03++	1...Bxh4 (10.428.671) 514.8
 10.01	 0:31 	+4.60 	1...Bxh4 2.gxh4 Rf3 3.dxe5 Rxd3 4.exd3 dxe5 5.Ne3 Nf6 6.Nd5
Nxd5 7.cxd5 Qf5 8.Rf1 Qxd3 9.Rxf8+ Kxf8 (15.507.794) 511.7
 10.42	 0:32 	+4.60 	1...Bxh4 2.gxh4 Rf3 3.dxe5 Rxd3 4.exd3 dxe5 5.Ne3 Nf6 6.Nd5
Nxd5 7.cxd5 Qf5 8.Rf1 Qxd3 9.Rxf8+ Kxf8 (16.375.645) 501.8
 11.01	 1:09 	+5.10++	1...Bxh4 (33.555.739) 501.7
 11.01	 1:55 	+5.27 	1...Bxh4 2.gxh4 Rf3 3.dxe5 Rxd3 4.exd3 dxe5 5.Nb4 Nd6 6.c5
Nf5 7.cxb6 Nxh4+ 8.Kh1 cxb6 9.Rc7 Qd6 (53.889.012) 480.2
 11.42	 2:02 	+5.27 	1...Bxh4 2.gxh4 Rf3 3.dxe5 Rxd3 4.exd3 dxe5 5.Nb4 Nd6 6.c5
Nf5 7.cxb6 Nxh4+ 8.Kh1 cxb6 9.Rc7 Qd6 (58.521.467) 472.6
 12.01	 4:22 	+5.27 	1...Bxh4 2.gxh4 Rf3 3.dxe5 Rxd3 4.exd3 dxe5 5.Ne3 Qc6 6.Nd5
Nf6 7.Re1 Nxd5 8.cxd5 Qxd5+ 9.Re4 Qxd3 10.Rxg4+ Kh8 11.Rc3 Qe2+ 12.Kh3 Qxb2
13.Rxc7 Qxa2 (119.359.074) 478.5
 12.42	 4:56 	+5.27 	1...Bxh4 2.gxh4 Rf3 3.dxe5 Rxd3 4.exd3 dxe5 5.Ne3 Qc6 6.Nd5
Nf6 7.Re1 Nxd5 8.cxd5 Qxd5+ 9.Re4 Qxd3 10.Rxg4+ Kh8 11.Rc3 Qe2+ 12.Kh3 Qxb2
13.Rxc7 Qxa2 (137.594.520) 464.1
 13.01	11:52 	+5.77++	1...Bxh4 (319.126.990) 464.1

--
GCP



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