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Subject: Re: Mate in 14

Author: John Merlino

Date: 22:33:01 02/02/03

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On February 03, 2003 at 01:28:14, John Merlino wrote:

>On February 03, 2003 at 00:21:38, Luis Smith wrote:
>
>>Here's a position that came across during one of my games on Fics that I tweaked
>>a little.
>>
>>[D]rq2b1k1/p2Rp2p/1p2np1Q/2p5/2P1P3/P4PN1/2P2PKP/3R4 w - - 0 33
>>
>>Ruffian found mate in 14...beginning with...Rxe7!
>
>Chessmaster 9000, on a P3-733, announces Mate in 14 after 1:04, then Mate in 13
>after 2:36. Somebody else reported a Mate in 12, but The King does not see it in
>a reasonable amount of time on my comp:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	6.03	2046		33.Rxe7 Bf7 34.Qxf6
>0:00	1/4	6.39	5303		33.Rxe7 Bf7 34.Nh5 Bxh5 35.Qxh7+
>					Kf8 36.Rxe6
>0:00	1/5	8.94	20836		33.Rxe7 Bg6 34.Rxe6 Kf7 35.Red6 Qc7
>0:01	1/6	9.20	76422		33.Rxe7 Bg6 34.Rxe6 Qc7 35.Rxf6
>					Rd8 36.Nf5
>0:01	1/7	9.11	115499		33.Rxe7 Bg6 34.Rxe6 Qc7 35.Rxf6
>					Re8 36.Rdd6 Bf7
>0:07	1/8	14.94	673014		33.Rxe7 Bg6 34.Rxh7 Nf4+ 35.Kf1
>					Qf8 36.Rh8+ Kf7 37.Nf5 Bxf5 38.Rxf8+
>					Rxf8 39.exf5 Ra8 40.Qh7+ Kf8 41.Qh8+
>					Ke7 42.Qxa8
>0:11	1/9	14.94	1135051		33.Rxe7 Bg6 34.Rxh7 Nf4+ 35.Kf1
>					Qf8 36.Rh8+ Kf7 37.Nf5 Bxf5 38.Rxf8+
>					Rxf8 39.exf5 Ra8 40.Qh7+ Kf8 41.Qh8+
>					Ke7 42.Qxa8
>0:23	1/10	16.39	2500376		33.Rxe7 Bg6 34.Rxh7 Nf4+ 35.Kf1
>					Qf8 36.Rh8+ Kf7 37.Nf5 Bxf5 38.Rxf8+
>					Rxf8 39.exf5 Ke7 40.Re1+ Kd7 41.Qxf8
>					Kc6 42.Qxf6+ Kb7
>1:04	2/11	Mate14	7996661		33.Rxe7 Bg6 34.Rxh7 Nf4+ 35.Kf1
>					Qf8 36.Rh8+ Kf7 37.Nf5 Bxf5 38.Rxf8+
>					Rxf8 39.exf5 Ke7 40.Qxf4 Re8 41.Qh6
>					Rf8 42.Qe3+ Kf7 43.Rd7+ Kg8 44.Qe7
>					Rf7 45.Qxf7+ Kh8 46.Qg7#
>2:36	3/12	Mate13	20739618	33.Rxe7 Bg6 34.Rxh7 Nf4+ 35.Kf1
>					Qf8 36.Rh8+ Kf7 37.Nf5 Bxf5 38.Rxf8+
>					Rxf8 39.exf5 Ke7 40.Qxf4 Re8 41.Qh6
>					Rf8 42.Qg7+ Rf7 43.Qg8 Rg7 44.Qd8+
>					Kf7 45.Rd7#
>7:33	4/13	Mate13	63447641	33.Rxe7 Bg6 34.Rxh7 Nf4+ 35.Kf1
>					Qf8 36.Rh8+ Kf7 37.Nf5 Bxf5 38.Rxf8+
>					Rxf8 39.exf5 Ke7 40.Qxf4 Re8 41.Qh6
>					Rf8 42.Qg7+ Rf7 43.Qg8 Rg7 44.Qd8+
>					Kf7 45.Rd7#
>
>jm

Apparently, in the final PV, 40.Re1+ leads to mate one move faster than 40.Qxf4.
So it is a Mate in 12....

jm



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