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Subject: Re: Test position === Fischer vs Stein, 1967 Sousse Interzonal

Author: John Merlino

Date: 11:08:56 12/19/02

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On December 19, 2002 at 12:23:09, José Antônio Fabiano Mendes wrote:

>         Fischer vs Stein, 1967 Sousse Interzonal
>  [D]3q3r/4b1k1/4P1p1/rpp2p1p/1nn2Q2/5N1P/P4PP1/RBB1R1K1 w
>  And here Fischer played 29. Bxf5, a move that baffles me.
>  Please see ==> http://www.mark-weeks.com/chess/67fs07.htm

CM9000, on a P3-733, doesn't get it either:

Time	Depth	Score	Positions	Moves
0:00	1/4	0.06	10238		1.Ne5 Nd5 2.Qg3 Nxe5 3.Rxe5
0:01	1/5	-0.97	46293		1.Ne5 Bd6 2.Bxf5 Qf6 3.Bxg6 Bxe5
0:02	1/5	-0.77	145883		1.a3 Bf6 2.e7 Qe8 3.Ne5 Qxe7
0:02	1/5	-0.36	158459		1.Nd2 Nd5 2.Qg3 h4 3.Qd3
0:03	1/6	-0.20	216927		1.Nd2 Bf6 2.Nxc4 bxc4 3.e7 Qc8
					4.Re5 Bxe5 5.Qxe5+ Kh7
0:06	1/7	-0.55	451357		1.Nd2 Bf6 2.Nxc4 bxc4 3.e7 Qc8
					4.Re5 Nd3 5.Bxd3 cxd3
0:13	1/7	-0.31	951025		1.Ng5 Nd3 2.Bxd3 Qxd3 3.Nf7 Qc3
					4.Bb2 Qxb2 5.Nxh8 Rxa2 6.Rxa2 Qxa2
0:18	1/8	-0.35	1319790		1.Ng5 Qd4 2.Qxd4+ cxd4 3.Nf7 Rc8
					4.Bh6+ Kh7 5.Bf4 Nd5
0:28	1/8	-0.30	2122091		1.Nd2 Bf6 2.Nxc4 bxc4 3.e7 Qd7
					4.a3 Bxa1 5.axb4 cxb4 6.Qxc4 Bc3
0:55	1/9	-0.27	4217595		1.Nd2 Bf6 2.Nxc4 bxc4 3.e7 Qe8
					4.a3 Bxa1 5.axb4 cxb4 6.Qxc4 Bc3
2:18	1/10	-0.69	10944478	1.Nd2 Nd5 2.Qf3 Bf6 3.Nxc4 bxc4
					4.Rd1 Bd4 5.Bb2 Bxb2 6.Rxd5 Bxa1
					7.Rxd8 Rxd8
6:29	1/10	-0.45	31157865	1.Ng5 Qb8 2.Nf7 Qxf4 3.Bxf4 Rha8
					4.Ne5 Na3 5.Nd3 Nxb1 6.Nxb4 cxb4
					7.Raxb1 Rxa2

If I force Bxf5:

Time	Depth	Score	Positions	Moves
0:00	1/3	-1.30	5438		1...gxf5 2.Qxf5 Qf8 3.Qe4 Qf6 4.Bg5
0:00	1/4	-1.30	11342		1...gxf5 2.Qxf5 Qf8 3.Qe4 Qf6 4.Bg5
0:00	1/5	-1.20	53161		1...gxf5 2.a3 Qf8 3.Bd2 Rxa3 4.Rxa3
					Nxa3
0:02	1/6	-1.37	170541		1...gxf5 2.Qxf5 Qf8 3.Qe4 Bf6 4.Rb1
					Qe7 5.a3 Nxa3
0:06	1/7	-1.18	487774		1...gxf5 2.a3 Bf6 3.Qg3+ Kh7 4.Ng5+
					Bxg5 5.Bxg5 Qd4 6.Qc7+ Kg6
0:14	1/8	-0.75	1133699		1...gxf5 2.a3 Nd5 3.Qxf5 Bf6 4.Bg5
					Bxg5 5.Nxg5 Rxa3 6.Rxa3 Nxa3
0:48	1/9	-0.94	3923438		1...gxf5 2.a3 Nd3 3.Qxf5 Nxc1 4.Raxc1
					Qf8 5.Qb1 Qf6 6.Rcd1
2:28	1/10	-0.79	12123749	1...gxf5 2.a3 Nd3 3.Qxf5 Nxc1 4.Raxc1
					Qf8 5.Qb1 Qf4 6.Rcd1 Rxa3 7.Qxb5
8:35	2/11	-0.48	42050761	1...gxf5 2.Qxf5 Qf8 3.Qe4 Bf6 4.Nh4
					Qe8 5.Nf5+ Kg8 6.e7 Ra6 7.Rb1 Bc3
					8.Rd1 Kf7 9.a3 Nxa3

jm



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