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Subject: Re: Mate in 12..

Author: John Merlino

Date: 14:02:11 06/03/04

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On June 03, 2004 at 16:05:17, Rob Basham wrote:

>[D]6n1/1N4p1/6Pp/1B1NpP2/P2kP3/1p3PpK/2P4P/rb2b3 w - - 0 1
>
>1. Nd8 mates in 12..
>
>Ruffian 101 ann. a mate in 22 seconds...(first attempt)....P3/850
>
>After that.... it ann. mate in less than a second!

That "less than a second" is due to learning.

CM_SKR finds Mate in 12 in 0:11 on an AMD 2500:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	607		1.Nd8 Kc5 2.Nb7+ Kd4
0:00	1/4	0.00	1668		1.Nd8 Kc5 2.Nb7+ Kd4
0:00	1/5	0.00	7159		1.Nd8 Kc5 2.Nb7+ Kd4
0:00	1/6	0.00	23480		1.Nd8 Kc5 2.Nb7+ Kd4
0:00	1/7	0.13	78828		1.Nd8 Kc5 2.Ne6+ Kd6 3.c4 Bxe4
					4.fxe4 Rc1 5.c5+ Rxc5 6.Nxg7 Rc2
					7.Ne8+ Kc5 8.hxg3
0:00	1/8	0.13	119263		1.Nd8 Kc5 2.Ne6+ Kd6 3.c4 Bxe4
					4.fxe4 Rc1 5.c5+ Rxc5 6.Nxg7 Rc2
					7.Ne8+ Kc5 8.hxg3
0:01	1/9	0.40	243223		1.Nd8 Kc5 2.Ne6+ Kd6 3.c4 Bxe4
					4.fxe4 Rc1 5.Nb6 Ne7 6.c5+ Rxc5
					7.Nxg7 Rc2 8.Nc4+ Kc7 9.hxg3
0:02	1/10	0.59	631068		1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
					4.hxg3 h5 5.cxb3 Bc2 6.Nd5+ Kd6
					7.Nxg7 Bxb3 8.Ne8+ Kc5
0:05	1/11	1.76	1334559		1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
					4.hxg3 Bb4 5.Nd5+ Kd6 6.Nd8 Kc5
					7.cxb3 Ra3 8.Ne6+ Kd6 9.Nxb4 Rxb3
0:11	2/12	Mate12	3241645		1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
					4.Nc8+ Kf6 5.Nf8 Kg5 6.hxg3 Bxg3
					7.Ne6+ Kf6 8.Nb6 Ke7 9.Nd5+ Kd6
					10.Nd8 Kc5 11.Nb7+ Kd4 12.c3#
0:17	3/13	Mate12	5795084		1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
					4.Nc8+ Kf6 5.Nf8 Kg5 6.hxg3 Bxg3
					7.Ne6+ Kf6 8.Nb6 Ke7 9.Nd5+ Kd6
					10.Nd8 Kc5 11.Nb7+ Kd4 12.c3#
0:39	4/14	Mate12	15044662	1.Nd8 Kc5 2.Ne6+ Kd6 3.Nb6 Ke7
					4.Nc8+ Kf6 5.Nf8 Kg5 6.hxg3 Bxg3
					7.Ne6+ Kf6 8.Nb6 Ke7 9.Nd5+ Kd6
					10.Nd8 Kc5 11.Nb7+ Kd4 12.c3#

jm



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