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Subject: Re: Engine new testposition: Zukertort-Blackburne, London 1883

Author: John Merlino

Date: 09:14:00 08/17/05

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On August 17, 2005 at 06:31:25, Michael Gurevich wrote:

>2r3k1/pbr1q2p/1p2p1p1/5P2/3Pp3/1P2R3/PB1Q2PP/5RK1 w - - 0 25
>
>In this position played Zukertort
>25.fxg6! +-
>
>Test your engines!
>
>Regards,
>Michael

CM9_R1 on a P4-2.4 finds it in 25 seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	1.13	1008		25.fxg6 hxg6 26.Rg3 Qh7 27.Qf4
0:00	1/4	0.99	2875		25.fxg6 hxg6 26.Rg3 Qg7 27.d5 Rc2
0:00	1/5	-0.55	10209		25.fxg6 Rc2 26.gxh7+ Kh8 27.d5+
					e5 28.Bxe5+ Qxe5
0:00	1/5	0.55	14343		25.f6 Qf7 26.Rc3 Ba6 27.Rxc7 Qxc7
0:00	1/6	0.68	56611		25.f6 Qf7 26.Rc3 Rxc3 27.Bxc3 Ba6
0:00	1/7	0.21	88742		25.f6 Qf7 26.Rc3 Rxc3 27.Bxc3 Ba6
					28.Rf2 Bd3
0:01	1/8	0.57	270404		25.f6 Qf8 26.Rc3 Ba6 27.Rf2 Bd3
					28.Ba3 Qxa3 29.f7+ Kg7 30.Rxc7
					Rxc7 31.f8=Q+ Qxf8 32.Rxf8 Kxf8
0:03	1/9	0.42	659605		25.f6 Qf7 26.Rc3 Rxc3 27.Bxc3 Ba6
					28.Rf2 Bd3 29.Bb4 Qc7
0:07	1/10	0.46	1417071		25.f6 Qf7 26.Rc3 Rxc3 27.Bxc3 Ba6
					28.Rf2 Bd3 29.Bb4 Rc2 30.Qe3
0:25	1/10	1.75	4928757		25.fxg6 hxg6 26.Rg3 Qg7 27.d5 e5
					28.Qg5 Rf7 29.Rxf7 Qxf7 30.Qxe5
1:37	1/11	2.29	18899076	25.fxg6 h5 26.Rg3 h4 27.Rg4 Rf8
					28.Rxf8+ Qxf8 29.Rxh4 Ba6 30.Rf4
					Qh6 31.d5 Qxg6

jm



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