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Subject: Re: Ruffian finds Mate in 11 in under 3 min; CM10 : #9 in 6 sec !

Author: Vincent Lejeune

Date: 09:20:44 01/19/05

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Time	Depth	Score	Positions	Moves
0:02	1/10	7.53	781212		1.Nxf7+ Rxf7 2.Bxf7 Qf8 3.Bxg6
					Nf7 4.Bxf7 c5 5.Re1 b6 6.Re8 Ba6+
					7.Kg1
0:05	1/10	Mate10	1808572		1.Bd3 h5 2.Ne6 Kh7 3.Bc1 Kg8 4.Qh6
					Nf5 5.Bxf5 Qxf6 6.Qxf8+ Kh7 7.Ng5+
					Qxg5 8.Bxg5 gxf5 9.Qxf7+ Kh8 10.Bf6#
0:06	1/11	Mate09	2481522		1.Bd3 h5 2.Bxg6 Kg8 3.Bh7+ Kh8
					4.Ne6 fxe6 5.Qh6 Rf7 6.Bg6+ Kg8
					7.Bxf7+ Kxf7 8.Qg7+ Ke8 9.Qg8#
0:10	1/12	Mate09	4282581		1.Bd3 h5 2.Bxg6 Kg8 3.Bh7+ Kh8
					4.Ne6 fxe6 5.Qh6 Rf7 6.Bg6+ Kg8
					7.Bxf7+ Kxf7 8.Qg7+ Ke8 9.Qg8#
0:26	1/13	Mate09	11330052	1.Bd3 Rg8 2.Qh4 h5 3.Bxg6 fxg6
					4.f7+ Rg7 5.Qd4 Nf5 6.Re1 Qe7 7.Rxe7
					Nxd4 8.Bxd4 d5 9.f8=Q#
0:53	2/14	Mate09	22953851	1.Bd3 Rg8 2.Qh4 h5 3.Bxg6 fxg6
					4.f7+ Rg7 5.Qd4 Nf5 6.Re1 Qe7 7.Rxe7
					Nxd4 8.Bxd4 d5 9.f8=Q#


On January 19, 2005 at 03:38:25, Richard A. Fowell wrote:

>This position is from Jack Peter's chess column in last Sunday's Los Angeles
>Times:
>http://www.latimes.com/features/puzzles/chess/?track=mainnav-chess
>
>[D]rnbq1r1k/pppp1p1p/3n1Pp1/6N1/2B2Q2/8/PB3PPP/R4K1R w - -
>
>On my 867 MHz Mac G4, Ruffian 2.1 takes less than three minutes to claim Mate in
>11, with
>
>+mate 11 18/2 2:25 73712484 nodes 506905 nps
>
>1. Nxf7 Rxf7 2. Bxf7 Qf8 3. Bxg6 Nf7 4. Qh4 Qg8 5. Bxf7 Qxf7 6. Re1 h5 7. Re8
>Kh7 8. Qe4 Qg6 9. Qe7 Kh6 10. Bc1 Qg5 11. Qg7
>
>MacChess, and HIARCS take more 12 minutes to settle on Nxf7, and more than 20
>minutes
>to claim a Mate score, and even then take longer to claim Mate in 11. Fruit
>2.0.0 does not
>even find the key move in 25 minutes.
>
>How do others fare - and is this really Mate in 11?
>
>-Richard




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