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Subject: Re: Peculiar Chess Test Position

Author: Vincent Lejeune

Date: 04:59:55 07/18/04

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On July 18, 2004 at 05:30:16, Joachim Rang wrote:

>On July 18, 2004 at 05:21:56, Vincent Lejeune wrote:
>
>>On July 17, 2004 at 23:54:49, Stuart Cracraft wrote:
>>
>>>[D]3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w - - 0 1
>>>
>>>White to play and mate.
>>>
>>>Is this a joke or real?
>>>
>>>Stuart
>>
>>Very real
>>
>>Chessmaster 10 (TheKing 3.33), AMD barton@3000+, 64 MB hash :
>>
>>Time	Depth	Score	Positions	Moves
>>0:01	1/9	31.30	304669		1.e3 Kd7 2.Qg4+ Kc7 3.Nc3 Kb8 4.Qb4+
>>					Ka8 5.Ba6 Qc7 6.Nf3 Qc6
>>0:02	1/10	31.47	538504		1.e3 Kd7 2.Qg4+ Kc7 3.Nc3 Kb8 4.Bb5
>>					Qd6 5.Qg8+ Ka7 6.Nf3 Qe7
>>0:05	1/11	31.57	1234684		1.e3 Kd7 2.Qg4+ Kc7 3.Nc3 Kb8 4.Qb4+
>>					Kc7 5.Nf3 Kc8 6.Ba6+ Kd7 7.Qd4+
>>					Ke8 8.Bb5+ Ke7 9.Qxd8+ Kxd8
>>0:15	1/12	31.70	3626176		1.e3 Kd7 2.Qg4+ Kc7 3.Nc3 Qd7 4.Qxd7+
>>					Kxd7 5.Nf3 Ke7 6.Bd3 Kd6 7.h3 Ke7
>>0:33	2/13	31.88	8311544		1.e3 Kd7 2.Qg4+ Kc7 3.Nc3 Qd7 4.Qxd7+
>>					Kxd7 5.Nf3 Ke7 6.Bd3 Kf7 7.b3 Kf6
>>					8.Ba3
>>2:52	2/13	32.21	51643257	1.e4 Qg5 2.Nc3 Qg6 3.Qf3 Qf7 4.Bb5+
>>					Kf8 5.Qxf7+ Kxf7 6.Nf3 Ke6 7.d3
>>					Kf7 8.Be3 Ke7
>>3:57	2/14	37.34	72214796	1.e4 Qg5 2.d4 Qg6 3.Qf3 Kd7 4.Qh3+
>>					Ke7 5.Qa3+ Kf7 6.Bc4+ Ke8 7.Qa8+
>>					Kd7 8.Qb7+ Ke8 9.Bf7+ Qxf7 10.Qc8+
>>					Ke7 11.Bg5+ Qf6 12.Qc7+ Ke8 13.Bxf6
>>9:58	2/15	Mate15	208018481	1.e4 Qg5 2.d4 Qg6 3.Qf3 Kd7 4.Bb5+
>>					Kc7 5.Bf4+ Kb7 6.Qa3 Qxe4+ 7.Ne2
>>					Qe6 8.Ba6+ Kb6 9.c4 Qf5 10.c5+
>>					Qxc5 11.dxc5+ Kc6 12.Qa4+ Kd5 13.Qc4+
>>					Kc6 14.Qe6+ Kxc5 15.Qd6#
>>18:46	3/16	Mate13	408438953	1.e4 Qg5 2.d4 Qg6 3.Qf3 Kd7 4.Bb5+
>>					Kc7 5.Bf4+ Kb7 6.Qb3 Qxe4+ 7.Ne2
>>					Qc6 8.Qf7+ Kb6 9.Bxc6 Kxc6 10.Qc7+
>>					Kb5 11.Qb7+ Ka5 12.Bd2+ Ka4 13.Qa6#
>>1:12:17	3/17	Mate12	1714468734	1.e4 Qg5 2.Qf3 Qg6 3.Bb5+ Ke7 4.d4
>>					Qf6 5.Qh3 Qxd4 6.Qh7+ Kf6 7.Be8
>>					Qb4+ 8.Nc3 Qa5 9.Qf7+ Ke5 10.Nf3+
>>					Kd6 11.Qd7+ Kc5 12.Qd4#
>
>
>Sure there is not a mate in 11? After 1.e4 Qg5 2. d4 Qg6 CM 3.23 announces mate
>in 11 on my machine. Too bad that CM does not support backward analysis and does
>not use its Hashtables of previous searches.
>
>regards Joachim


I don't remember , I ran this position some month ago with CM9000...
You're probably right, but we can't verify in the archive now :(



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