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Subject: Re: Testposition - Tactics

Author: John Merlino

Date: 14:10:29 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

Chessmaster 9000, on a P4-2.4, switches to Qc4+ in eight seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.33	2647		1.Qxa5 Bf7 2.b4 Rc8
0:00	1/4	1.38	6683		1.Qxa5 Rc8 2.Rc7 Rxc7 3.Qxc7
0:00	1/5	1.12	23283		1.Qxa5 Rc8 2.b4 Rc2 3.Qa4
0:00	1/6	0.81	88029		1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Re1 Kh8
					4.Qd2 Rg8+ 5.Kf1
0:01	1/7	0.81	175668		1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Re1 Kh8
					4.Qd2 Rg8+ 5.Kf1
0:02	1/8	0.00	372351		1.Qxa5 Bf3 2.Bxf3 Qxf3 3.Qc7 Qg4+
					4.Kh2 Qh4+ 5.Kg1 Qg5+ 6.Kh2 Qh4+
0:08	1/8	0.10	1477236		1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Bxb3
					4.Qb6 Bf7 5.a4 Rc2
0:18	1/9	0.14	3161318		1.Qc4+ Bf7 2.Qa4 Rc8 3.b4 axb4
					4.axb4 Rc1 5.b5 Rxf1+ 6.Bxf1
0:30	1/10	0.06	5611633		1.Qc4+ Bf7 2.Qc7 Rde8 3.Rxe8 Rxe8
					4.Qxa5 Bxb3 5.Qc7 Bf7 6.a4 Ra8
1:07	2/11	0.10	13140590	1.Qc4+ Bf7 2.Qc7 Rc8 3.Qxa5 Bxb3
					4.Qb5 Bf7 5.a4 Rc2 6.a5 Qg4 7.Rb1

jm



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