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Subject: Re: Mate in 16...

Author: John Merlino

Date: 17:13:59 12/12/02

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On December 12, 2002 at 19:47:18, Art Basham wrote:

>Ruffian announced mate in 16 in only afew seconds...
>begining with
>1. Rg4+..etc.
>
>[D]1b6/4R1R1/rp6/3K4/k7/pp3N2/bp1B4/7q w - - 0 1

It took CM9000 on a P3-733 less than one second to announce Mate in 16:

Time	Depth	Score	Positions	Moves
0:00	1/3	0.00	2454		1.Rg4+ Kb5 2.Rb4+ Ka5 3.Rc4+ Kb5
					4.Rb4+
0:00	1/4	0.00	10044		1.Rg4+ Kb5 2.Rb4+ Ka5 3.Rc4+ Kb5
					4.Rb4+
0:00	1/5	Mate16	36866		1.Rg4+ Kb5 2.Rb4+ Ka5 3.Rbe4+ Kb5
					4.Nd4+ Ka4 5.Ne2+ Kb5 6.Nc3+ Ka5
					7.Nxa2+ Kb5 8.Nc3+ Ka5 9.Ne2+ Kb5
					10.Nd4+ Ka4 11.Nf3+ Kb5 12.Rb4+
					Ka5 13.Rxb3+ Ka4 14.Rb4+ Ka5 15.Rxb2+
					Ka4 16.Re4#
0:01	1/6	Mate16	111204		1.Rg4+ Kb5 2.Rb4+ Ka5 3.Rbe4+ Kb5
					4.Nd4+ Ka4 5.Ne2+ Kb5 6.Nc3+ Ka5
					7.Nxa2+ Kb5 8.Nc3+ Ka5 9.Ne2+ Kb5
					10.Nd4+ Ka4 11.Nf3+ Kb5 12.Rb4+
					Ka5 13.Rxb3+ Ka4 14.Rb4+ Ka5 15.Rxb2+
					Ka4 16.Re4#
0:02	1/7	Mate16	329917		1.Rg4+ Kb5 2.Rb4+ Ka5 3.Rbe4+ Kb5
					4.Nd4+ Ka4 5.Ne2+ Kb5 6.Nc3+ Ka5
					7.Nxa2+ Kb5 8.Nc3+ Ka5 9.Ne2+ Kb5
					10.Nd4+ Ka4 11.Nf3+ Kb5 12.Rb4+
					Ka5 13.Rxb3+ Ka4 14.Rb4+ Ka5 15.Rxb2+
					Ka4 16.Re4#

As with the previous position that you posted, all of White's moves are checks,
and Black has only one or two legal replies, which makes finding the mate much
easier....

jm



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