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Subject: Re: Mate in 10!

Author: John Merlino

Date: 16:02:27 05/21/05

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On May 21, 2005 at 18:31:26, Rob Basham wrote:

>[D]r4k2/pp1q1p1p/5r1N/2pp2Q1/8/1P1PP3/P2P2P1/5RK1 w - - 0 1
>
>Try to guess move one...:-)
>
>Ruffian 1.0.1 takes 50 sec. to ann mate.
>
>P3-850
>
>See how long it takes your engine to announce mate!
>
>Rob

Uh, it's a Mate in 10, says The King. This is CM9_R1 on a P4-2.4, and it finds
it in eighteen seconds:

Time	Depth	Score	Positions	Moves
0:00	1/3	10.64	1657		1.Rxf6 Re8 2.Rxf7+ Qxf7 3.Nxf7
					Kxf7 4.Qxd5+ Re6 5.Qxb7+ Kf6
0:00	1/4	11.61	6906		1.Rxf6 Qe8 2.Rxf7+ Qxf7 3.Nxf7
					Kxf7 4.Qxd5+ Kf6 5.Qxb7
0:00	1/4	13.66	10295		1.Qxf6 Rc8 2.Nf5 Qxf5 3.Rxf5
0:00	1/5	17.37	14908		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
					4.Rxd7+ Kxd7 5.Qxa8
0:00	1/6	18.77	62023		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
					4.Qxa8 Qxf7 5.Nxf7+ Kc6 6.Qxa7
0:00	1/7	19.21	85502		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
					4.Qxa8 Qxf7 5.Nxf7+ Ke6 6.Qxb7 a6
0:00	1/8	19.55	151793		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Rxf7+ Kd6
					4.Qxa8 Qxf7 5.Nxf7+ Kc6 6.Qc8+
					Kb6 7.Nd6 c4 8.dxc4
0:02	2/9	23.14	754704		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
					4.Nf5 f6 5.Qxf6+ Qf7 6.Qh8+ Qg8
					7.Nh6+ Ke7 8.Nxg8+ Rxg8 9.Qxh7+
					Kd8 10.Qxg8+ Kc7 11.Qxd5
0:05	2/10	23.14	1617047		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
					4.Nf5 f6 5.Qxf6+ Qf7 6.Qh8+ Qg8
					7.Nh6+ Ke7 8.Nxg8+ Rxg8 9.Qxh7+
					Kd8 10.Qxg8+ Kc7 11.Qxd5
0:18	2/11	Mate10	5437704		1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
					4.Rf5 a5 5.Qh8+ Ke7 6.Qf6+ Ke8
					7.Re5+ Qe6 8.Qxf7+ Kd8 9.Rxe6 Kc8
					10.Re8#
0:33	3/12	Mate10	10146584	1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
					4.Rf5 a5 5.Qh8+ Ke7 6.Qf6+ Ke8
					7.Re5+ Qe6 8.Qxf7+ Kd8 9.Rxe6 Kc8
					10.Re8#
1:10	3/13	Mate10	23068150	1.Qxf6 Ke8 2.Qh8+ Ke7 3.Qe5+ Kf8
					4.Rf5 a5 5.Qh8+ Ke7 6.Qf6+ Ke8
					7.Re5+ Qe6 8.Qxf7+ Kd8 9.Rxe6 Kc8
					10.Re8#

jm



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