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Subject: Re: Mate in 10...!

Author: John Merlino

Date: 07:35:20 12/14/02

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On December 14, 2002 at 10:02:31, Art Basham wrote:

>See how fast your program or engine ann. a mate in 10!
>
>[D]8/8/4k3/2K1N1B1/5Pp1/8/2B2P1p/6n1 w - - 0 1
>
>1. Ba4 mates!

This one actually takes CM9000, on a P3-733, a little while longer than
expected, especially considering that Black always either has only one legal
move, or has only one move that does not allow an immediate mate by White:

Time	Depth	Score	Positions	Moves
0:00	1/3	5.32	1485		1.Bd1 Nf3 2.Bb3+ Kf5 3.Bc2+ Ke6
0:00	1/3	6.14	1612		1.Be4 Nf3 2.Bd5+ Kf5 3.Nxf3 gxf3
					4.Bxf3
0:00	1/4	6.30	4164		1.Be4 Nf3 2.Nxf3 gxf3 3.Bxf3 Kf5
					4.Bh1
0:00	1/4	7.65	7392		1.Bb3+ Kf5 2.Kd6 h1=Q 3.Be6+ Ke4
					4.Bd5+ Kf5 5.Bxh1 Ne2
0:00	1/5	7.65	13826		1.Bb3+ Kf5 2.Kd6 h1=Q 3.Be6+ Ke4
					4.Bd5+ Kf5 5.Bxh1 Ne2
0:01	2/6	6.85	71630		1.Bb3+ Kf5 2.Kd6 h1=Q 3.Be6+ Ke4
					4.Bd5+ Kf5 5.Bxh1 Nh3 6.Bc6 Nxf4
0:01	2/6	7.82	78134		1.Ba4 Kf5 2.Kd6 Ke4 3.Nxg4 Nh3
					4.Bc2+ Kd4 5.Nxh2 Nxf2
0:01	3/7	7.78	118361		1.Ba4 Kf5 2.Bd7+ Ke4 3.Nxg4 Ne2
					4.f3+ Kxf3 5.Nxh2+ Ke4 6.f5
0:03	4/8	8.02	294219		1.Ba4 Kf5 2.Bd7+ Ke4 3.Nxg4 Ne2
					4.f3+ Kxf3 5.Nxh2+ Kg3 6.Nf1+ Kf2
					7.Nd2 Ke3
0:08	5/9	7.96	934440		1.Ba4 Kf5 2.Bd7+ Ke4 3.Nxg4 Nh3
					4.f3+ Kxf3 5.Nxh2+ Kg2 6.Bxh3+
					Kxh3 7.Nf1 Kg4 8.Ne3+ Kh5
0:22	6/10	Mate10	2736684		1.Ba4 Kf5 2.Bd7+ Ke4 3.Be8 Kf5
					4.Bg6+ Ke6 5.Bh5 Kf5 6.Bxg4+ Ke4
					7.Bd1 Kf5 8.Bc2+ Ke6 9.f5+ Kxe5
					10.f4#
1:00	7/11	Mate10	7848112		1.Ba4 Kf5 2.Bd7+ Ke4 3.Be8 Kf5
					4.Bg6+ Ke6 5.Bh5 Kf5 6.Bxg4+ Ke4
					7.Bd1 Kf5 8.Bc2+ Ke6 9.f5+ Kxe5
					10.f4#

jm



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