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Subject: Re: ...Mate in 8

Author: Heiner Marxen

Date: 10:41:40 07/04/02

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On July 04, 2002 at 12:33:31, John Merlino wrote:

>On July 04, 2002 at 10:04:04, Art Basham wrote:
>
>>Then try this one...:-)
>>
>>my Shredder ann. a mate in 13...!
>>
>>[D]r3rbk1/p1p2p2/5P2/1p5Q/8/q2p4/6NP/5R1K w - -
>>
>>1. Ne3 mates..!
>
>Chessmaster 9000 announces Mate in 8 in three seconds on a PIII-733:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	0.00	697		1.Qg4+ Kh7 2.Qf5+ Kg8 3.Qg5+ Kh7
>					4.Qf5+
>0:00	1/4	0.00	1482		1.Qg4+ Kh7 2.Qf5+ Kg8 3.Qg5+ Kh7
>					4.Qf5+
>0:00	2/5	0.00	7447		1.Qg4+ Kh7 2.Qf5+ Kg8 3.Qg5+ Kh7
>					4.Qf5+
>0:00	2/5	5.25	50865		1.Ne3 Bg7 2.fxg7 f5 3.Qh8+ Kf7
>					4.g8=Q+ Rxg8 5.Rxf5+ Ke7 6.Qe5+
>					Kd8 7.Qd5+ Kc8 8.Qxa8+ Kd7 9.Qxg8
>0:03	2/6	Mate08	232957		1.Ne3 Bg7 2.fxg7 f6 3.Qd5+ Re6
>					4.Qxe6+ Kh7 5.Rg1 f5 6.g8=Q+ Rxg8
>					7.Qxg8+ Kh6 8.Qh8#
>0:04	3/7	Mate08	367304		1.Ne3 Bg7 2.fxg7 f6 3.Qd5+ Re6
>					4.Qxe6+ Kh7 5.Rg1 f5 6.g8=Q+ Rxg8
>					7.Qxg8+ Kh6 8.Qh8#
>0:08	3/8	Mate08	749229		1.Ne3 Bg7 2.fxg7 f6 3.Qd5+ Re6
>					4.Qxe6+ Kh7 5.Rg1 f5 6.g8=Q+ Rxg8
>					7.Qxg8+ Kh6 8.Qg6#
>
>jm

And Chest confirms this as shortest and unique (AMD 1500+) in 24 secs:

r3rbk1/p1p2p2/5P2/1p5Q/8/q2p4/6NP/5R1K w - - acn 4185217; acs 24; bm Ne3; ce
32752; dm 8; pv Ne3 Bg7 fxg7 f6 Qd5+ Re6 Qxe6+ Kh7 Rg1 f5 g8=Q+ Rxg8 Qf7+ Rg7
Qxg7#;

Cheers,
Heiner



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