Author: Uri Blass
Date: 06:02:43 09/14/03
Go up one level in this thread
On September 14, 2003 at 06:21:23, Sune Larsson wrote:
>
> [D]3r1rk1/4R3/5p1p/pQ2p2b/3pPq2/PP1P4/5PB1/5RK1 w - - 0 1
>
> This is a position from Shields,G - Schön,W, corr-2003.
>
> White played 32.Qxa5? and lost quickly after 32.-Bf3 33.Bxf3 Kh8!
> 34.Bg2 Rg8 35.Ra1 Qg4 36.Kf1 Qxg2+ 37.Ke2 Qg4+ 38.Kd2 Rc8 39.Rc7 Rxc7
> 40.Qxc7 Rc8 0-1.
>
> Much better was to keep black occupied on the 7th with 32.Qc4+ Bf7
> 33.Qc7 or 32.Qb7. ("And black has nothing serious" - Schön.)
>
>
> Test: Avoid 32.Qxa5 and instead choose one of the moves mentioned above.
>
>
> /S
A1000 (64 Mbytes)
Shredder changes its mind but I tend to believe that at depth 15 it finally
decides to avoid Qxa5 for the right reason(see its evaluation).
New game
3r1rk1/4R3/5p1p/pQ2p2b/3pPq2/PP1P4/5PB1/5RK1 w - - 0 1
Analysis by Shredder 7.04:
1.Qxa5
± (1.29) Depth: 1/1 00:00:00
1.Qxa5
± (1.29) Depth: 1/1 00:00:00
1.Qxa5 Be2
+- (1.46) Depth: 2/3 00:00:00
1.Qxa5 Be2 2.Qc7
± (1.20) Depth: 3/6 00:00:00
1.Qxa5 Be2 2.Re8
² (0.63) Depth: 3/6 00:00:00
1.Qxa5 Be2 2.Re1 Bxd3
= (0.02) Depth: 3/6 00:00:00
1.Qc4+ Kh8 2.Qc1 Rfe8
= (0.06) Depth: 3/8 00:00:00
1.Qc4+ Bf7 2.Qc7 Bxb3 3.Qxa5
= (0.16) Depth: 3/8 00:00:00
1.Rc7 Rb8 2.Qxa5 Rxb3
² (0.43) Depth: 3/8 00:00:00
1.Rc7 Be2 2.Rfc1
² (0.62) Depth: 3/8 00:00:00
1.Re1 Rde8 2.Rxe8 Rxe8 3.Qxa5
² (0.65) Depth: 3/9 00:00:00
1.Re1 Bf7 2.Qd5
² (0.65) Depth: 3/9 00:00:00
1.Re1 Qd2 2.Qd5+ Rxd5 3.Rg7+ Kxg7
² (0.40) Depth: 4/9 00:00:00
1.Re1 Rb8 2.Qxa5 Rxb3
= (0.24) Depth: 4/9 00:00:00
1.Qc4+ Bf7 2.Qc7 Ra8 3.Rb1
² (0.27) Depth: 4/11 00:00:00
1.Qc4+ Bf7 2.Qc7 Rde8 3.Rd7 Bxb3 4.Qxa5
² (0.37) Depth: 4/11 00:00:00
1.Rc7 Rd5 2.exd5 Qxf2+ 3.Rxf2
² (0.38) Depth: 4/11 00:00:00
1.Rc7 Be2 2.Rfc1 Rf7
² (0.67) Depth: 4/11 00:00:00
1.Rc7 Kh8 2.Qxa5 Be2 3.Rfc1 Bxd3
² (0.68) Depth: 5/11 00:00:00
1.Rc7 f5 2.Qxa5 Be2 3.Qd5+ Rxd5 4.Rg7+ Kxg7
² (0.43) Depth: 6/18 00:00:00 30kN
1.Rc7 f5 2.Qc6 fxe4 3.Bxe4 Qg4+ 4.Kh2 Rf7
² (0.41) Depth: 6/18 00:00:00 34kN
1.Qxa5 Be2 2.Qc7 Kh8 3.Rc1 Bxd3
² (0.42) Depth: 6/18 00:00:00 48kN
1.Qxa5 Be2 2.Qc7 Qxf2+ 3.Kxf2 Bf3 4.Bxf3
± (0.77) Depth: 6/18 00:00:00 50kN
1.Qxa5 Be2 2.Qc7 Qg4 3.Qc4+ Kh8 4.Rc1 Rg8 5.Qc3
± (0.77) Depth: 6/18 00:00:00 60kN
1.Qxa5 Be2 2.Qc7 Qg5 3.Qc4+ Kh8 4.f4 Qg3 5.fxe5 Bxf1 6.Qg8+ Rxg8
² (0.67) Depth: 7/19 00:00:01 105kN
1.Qxa5 Bf3 2.Qa6 Qg4 3.Qe6+ Qxe6 4.Rxe6 Be2 5.Rc1 Bxd3
² (0.57) Depth: 8/22 00:00:02 325kN
1.Qxa5 Bf3 2.Qa6 Qg4 3.Qe6+ Qxe6 4.Rxe6 Kf7 5.Bxf3 Kxe6 6.Bg4+ f5 7.Bxf5+ Kf7
² (0.32) Depth: 9/22 00:00:04 612kN
1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Qc7 Qg4+ 4.Kh2 Qh5+ 5.Kg2 Qg6+ 6.Kh1 Qh5+ 7.Kg1 Qg5+
8.Kh1 Qh4+ 9.Kg2 Qg5+ 10.Kf3 Kh8 11.Re1 Qh5+ 12.Kg2 Rg8+ 13.Kf1 Qe2+ 14.Rxe2
Rg1+ 15.Kxg1
= (-0.06) Depth: 9/32 00:00:05 788kN
1.Rb7 Qd2 2.Qc4+ Bf7 3.Qa6 Kg7 4.Rc7 Rc8 5.Rxc8 Qxf2+ 6.Kxf2
= (-0.05) Depth: 9/32 00:00:05 825kN
1.Rb7 Kh8 2.Qb6 Rg8 3.Qxa5 Be2 4.Qd5 Rxd5 5.Rh7+ Kxh7
= (-0.05) Depth: 9/32 00:00:06 1066kN
1.Qc4+ Bf7 2.Qc7 Rde8 3.Rxe8 Rxe8 4.Qxa5 Kg7 5.Qc7
= (-0.04) Depth: 9/32 00:00:08 1260kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Bxb3 4.Bh3 Qg5+ 5.Kh1 Rc1 6.Qb6
= (0.14) Depth: 9/32 00:00:08 1391kN
1.b4 axb4 2.axb4 Rb8 3.Qd5+ Bf7 4.Qd6 Kg7 5.Ra1 Rg8 6.Raa7
= (0.15) Depth: 9/32 00:00:09 1512kN
1.b4 Bf3 2.Bxf3 Qxf3 3.bxa5 Kh8 4.Rh7+ Kxh7 5.Qb7+ Kg6 6.Qh7+ Kxh7
= (0.15) Depth: 9/32 00:00:11 1759kN
1.Ra7 Bf7 2.Qxa5 Bxb3 3.Re1 Bf7 4.Rb1 Kg7 5.Rbb7
= (0.16) Depth: 9/32 00:00:11 1806kN
1.Ra7 Kh8 2.Qxa5 Rg8 3.Re1 Qf3 4.Qd5 Rxd5 5.Rh7+ Kxh7
= (0.16) Depth: 9/32 00:00:12 1929kN
1.Ra7 Kh8 2.Qxa5 Rg8 3.Re1 Qf3 4.Qd5 Rxd5 5.Kf1 Rxg2 6.Rh7+ Kxh7
= (-0.09) Depth: 10/32 00:00:15 2510kN
1.Ra7 Kh8 2.Qxa5 Rg8 3.Re1 Qf3 4.Qd5 Rxd5 5.Kf1 Rxg2 6.Rh7+ Kxh7
³ (-0.59) Depth: 10/32 00:00:16 2613kN
1.Ra7 Kh8 2.Qb7 Rf7 3.Qxf7 Bxf7 4.Rxf7 Rg8 5.f3 Qe3+ 6.Rf2 Qxd3 7.Rxf6 Qe3
-+ (-4.35) Depth: 10/32 00:00:23 3960kN
1.Qxa5 Bf3 2.Bxf3 Qxf3
-+ (-4.34) Depth: 10/32 00:00:23 3981kN
1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Re1 Kh8 4.Qc7 Rg8+ 5.Kf1 Qxd3+ 6.Re2 Qxe2+ 7.Kxe2 Rd7
8.Qxd7
-+ (-3.99) Depth: 10/32 00:00:24 4030kN
1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Qc7 Qg4+ 4.Kh2 Qh5+ 5.Kg2 Qg6+ 6.Kh1 Qh5+ 7.Kg1 Qg5+
8.Kh1 Qh4+ 9.Kg2 Qg5+ 10.Kf3 Kh8
= (-0.06) Depth: 10/32 00:00:27 4569kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Bxb3 4.Bh3 Qg5+ 5.Kh1 Qh4 6.Rg1+ Kh8 7.Kh2
= (-0.05) Depth: 10/32 00:00:29 4853kN
1.Qc4+ Bf7 2.Qc7 Ra8 3.b4 axb4 4.axb4 Rac8 5.Qd7 Rc2 6.Qd6 Rb2 7.Qa6 Rxb4 8.Qc4
Bxc4
= (0.14) Depth: 10/32 00:00:30 5160kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Bxb3 4.Rc7 Bf7 5.Rb1 Rxc7 6.Qxc7 Qd2
= (-0.04) Depth: 11/32 00:00:39 6646kN
1.Qc4+ Bf7 2.Qc7 Ra8 3.Rd7 Rfc8 4.Qb7 Rab8 5.Qa7 Ra8 6.Qb7 Rab8 7.Qa7 Ra8 8.Qb7
Rab8
= (0.00) Depth: 12/32 00:01:03 10687kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Bxb3 4.a4 Bf7 5.Rc7 Kg7 6.Qa7 Rg8 7.Rxc8
= (-0.01) Depth: 13/33 00:01:57 17195kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Kh8 4.Rc7 Bxb3 5.Qc5 Rxc7 6.Qxf8+ Kh7
= (-0.15) Depth: 14/33 00:04:34 35111kN
1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Qc7 Qg4+ 4.Kh2 Qh5+ 5.Kg2 Qg6+ 6.Kf3 Kh8 7.Rh1 Qxe4+
8.dxe4 Kg8
= (-0.14) Depth: 14/42 00:06:10 48632kN
1.Qxa5 Bf3 2.Bxf3 Kh8 3.Bg2 Rg8 4.Rd1 Qg4 5.Rxe5 Qxd1+ 6.Qe1 Qxe1+ 7.Kh2 fxe5
8.b4
= (-0.14) Depth: 14/42 00:07:27 59521kN
1.Qxa5 Bf3 2.Bxf3 Kh8 3.Bg2 Rg8 4.Rd1 Qg4 5.Rxe5 Qxd1+ 6.Qe1 Qxe1+ 7.Kh2 fxe5
8.Bf1
³ (-0.39) Depth: 15/47 00:16:22 129832kN
1.Qxa5 Bf3 2.Bxf3 Kh8 3.Bg2 Rg8 4.Rd1 Qg4 5.Rxe5 Qxd1+ 6.Qe1 Qxe1+ 7.Kh2 fxe5
8.Bh1
µ (-0.89) Depth: 15/47 00:17:54 142100kN
1.Qxa5 Bf3 2.Qc7 Qg5 3.Rg7+ Qxg7 4.Qxg7+ Kxg7 5.Bxf3 Rc8 6.Bg4 Rc3 7.Be6 Rxd3
8.a4 Rd2
-+ (-1.89) Depth: 15/47 00:26:03 224350kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Kh8 4.Rc7 Bxb3
-+ (-1.88) Depth: 15/47 00:26:13 225994kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Kh8 4.Rc7 Bxb3 5.Rxc8 Rxc8 6.f3 Rg8 7.Qa6 Qe3+ 8.Kh1
Rxg2
-+ (-1.53) Depth: 15/47 00:26:17 226714kN
1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Kh8 4.Rc7 Bxb3 5.Rfc1 Qxc1+ 6.Rxc1
= (-0.18) Depth: 15/47 00:27:54 241582kN
(Blass, Tel-Aviv 14.09.2003)
Uri
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