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Subject: Re: odd ball mate-in-12

Author: John Merlino

Date: 16:18:55 02/12/06

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On February 11, 2006 at 19:26:34, Mike Byrne wrote:

>FEN: [d]rnbQKbnr/pppppppp/8/8/8/8/PPPPPPPP/RNBqkBNR w - - 0 1
>
>Rybka 1.01 Beta 13d:
>  12	03:10	   8.448.128	45.583	+M12	1.Nc3 Qxc2 2.d3 Nf6+ 3.Kxf7 Kxf1 4.Nf3+ Kxg2
>5.Be3 Kh3 6.Rag1 Nh5 7.Rg3+

Not bad, but The King finds it much faster (this is on a P4-2.4):

Time	Depth	Score	Positions	Moves
0:00	1/3	1.10	2877		1.Nc3 Nf6+ 2.Kxf7 Qxc2 3.Nf3+ Kxf2
					4.d3 Nc6 5.Qxc7
0:00	1/3	4.59	8701		1.Nf3+ Kxf2 2.Ne5 Qxf1 3.Rxf1+
					Kxf1 4.Qxc8 Nc6
0:00	1/4	5.64	38200		1.Nf3+ Kxf2 2.Qxc7 d6 3.Qc4 Bd7+
					4.Kxf8 Nf6+ 5.Kxf7 Be8+ 6.Kxe7
0:00	1/5	5.82	79451		1.Nf3+ Kxf2 2.Qxc7 d6 3.Qc4 Bd7+
					4.Kxf8 Nf6+ 5.Kxf7 Be8+ 6.Kxe7
					Nc6+ 7.Ke6 Bd7+ 8.Kxd6
0:01	1/6	5.12	186474		1.Nf3+ Kxf2 2.Qxc7 d6 3.Qc4 Bd7+
					4.Kxf8 Nh6+ 5.Kxg7 Nf5+ 6.Kxh8
					Be6 7.Qc3 Nd7+ 8.Kxh7 Nf6+ 9.Qxf6
					exf6
0:06	1/7	3.58	1293424		1.Nf3+ Kxf2 2.Qxc7 d6 3.Qxc8 Nc6
					4.Qxa8 Nf6+ 5.Kxf7 Qxc2 6.d3 Qxc1
					7.b4 Qh6
0:11	1/7	7.04	2318875		1.Nc3 Nf6+ 2.Kxf7 Qxc2 3.d3 Kxf1
					4.Nh3+ Kxg2 5.Bg5 Kxh3 6.Qxc7 Qxd3
					7.exd3 e5 8.Bxf6
0:20	1/8	6.91	4570708		1.Nc3 Nf6+ 2.Kxf7 Kxf1 3.Nf3+ Kxg2
					4.Rxd1 Nc6 5.Qxc7 e5 6.Rg1+ Kxf2
					7.d3 Bb4 8.Bg5
0:44	1/9	Mate12	10372030	1.Nc3 Nf6+ 2.Kxf7 Kxf1 3.Nf3+ Kxg2
					4.Rxd1 Nc6 5.Rg1+ Kxf2 6.Nd1+ Kxe2
					7.Nd4+ Nxd4 8.Qxc7 d6 9.Qc4+ Kf3
					10.Qd3+ Kf4 11.Qe3+ Kf5 12.Rg5#

jm



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