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Subject: Re: Nguyen vs Zuger, Moscow 1994 Mate-in-11

Author: John Merlino

Date: 11:28:06 01/29/06

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On January 29, 2006 at 02:21:05, Mike Byrne wrote:

>Chess Genius 5 solved this problem in about 6 hours in the late 90's, now solved
>in less than a minute
>
>FEN: [d]r4r2/1q2ppk1/b1np2p1/6P1/4P3/1BNnBP2/PP1K4/R2Q3R w - - 0 1

Nineteen seconds for CM9_R1 to announce Mate in 12 on a P4-2.4:

Time	Depth	Score	Positions	Moves
0:01	1/6	0.17	143216		1.Kc2 Bc4 2.Qd2 Bxb3+ 3.axb3 Ncb4+
					4.Kb1 Rxa1+ 5.Kxa1 Kg8
0:01	1/6	0.80	174867		1.Qc2 Nc5 2.Nd5 Nxb3+ 3.Qxb3 Ne5
					4.Bd4
0:01	1/6	0.95	220066		1.Rb1 e6 2.Rh6 Na5 3.Bd4+ Ne5 4.Qh1
					Nxb3+ 5.axb3
0:01	1/6	1.44	281452		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Nce5
					4.Rh1 Nxf3+ 5.Kc2 Nb4+ 6.Kc1 Nh4
					7.Rxh4
0:02	1/7	2.60	343913		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Ne1
					4.Qxg6+ Kh8 5.Qh6+ Kg8 6.Rxe1 Ne5
					7.Rh1 Nxf3+ 8.Kc1
0:02	1/8	6.24	515236		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Nf4 5.Bxf4 Nd4 6.Rh1 Nxb3+
					7.Ke3
0:03	1/9	10.56	745514		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Nf4 5.Bxf4 Bf1 6.Rxf1 Nd4
					7.Nd5
0:05	1/10	10.77	1094011		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Nf4 5.Bxf4 Bf1 6.Rxf1 Nd4
					7.Nd5 Nxb3+ 8.Kc3
0:12	1/11	16.79	3110752		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Nf4 5.Bxf4 Bf1 6.Rxf1 Ra1
					7.Rxa1 Nd4 8.Nd5
0:19	1/12	Mate12	5432002		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Ne1 5.Rxe1 Bf1 6.Nd5 Ra2
					7.Nf6+ exf6 8.gxf6 Rxb2+ 9.Kc1
					Rb1+ 10.Kxb1 Bd3+ 11.Kc1 Bf1 12.Qg7#
0:33	1/13	Mate12	9945679		1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Ne1 5.Rxe1 Bf1 6.Nd5 Ra2
					7.Nf6+ exf6 8.gxf6 Rxb2+ 9.Kc1
					Rb1+ 10.Kxb1 Bd3+ 11.Kc1 Bf1 12.Qg7#
1:05	2/14	Mate12	20434543	1.Rh7+ Kxh7 2.Qh1+ Kg8 3.Qh6 Qxb3
					4.axb3 Ne1 5.Rxe1 Bf1 6.Nd5 Ra2
					7.Nf6+ exf6 8.gxf6 Rxb2+ 9.Kc1
					Rb1+ 10.Kxb1 Bd3+ 11.Kc1 Bf1 12.Qg7#

jm



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