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Subject: Re: Valentin Albillo unsolved #1 : SOLVED !!

Author: Heiner Marxen

Date: 16:05:45 06/27/03

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On June 24, 2003 at 12:32:06, Vincent Lejeune wrote:

>
>[d]3qk3/8/8/8/8/8/PPPPPPPP/RNBQKBNR w
>
>CM9000 found the mate !!!
>Celeron@875Mhz, 64 MB hash, SS=12
>
>Time 	Depth 	Score 	Positions	 Moves
>1:53:34	1/16	Mate12	1010138257	1.e4 Qd4 2.Bb5+ Ke7 3.Qg4 Qe5 4.Qd7+
>					Kf8 5.d4 Qxe4+ 6.Ne2 Qe7 7.Bh6+
>					Kf7 8.Bc4+ Kg6 9.Qxe7 Kxh6 10.Bd3
>					Kh5 11.f4 Kg4 12.Qg5#
>2:37:19	2/17	Mate12	1427960663	1.e4 Qd4 2.Bb5+ Ke7 3.Qg4 Qe5 4.Qd7+
>					Kf8 5.d4 Qxe4+ 6.Ne2 Qe7 7.Bh6+
>					Kf7 8.Bc4+ Kg6 9.Qxe7 Kxh6 10.Bd3
>					Kh5 11.f4 Kg4 12.Qg5#
>13:14:57	3/18	Mate11	-898402141	1.e4 Qd4 2.Qg4 Ke7 3.Nf3 Qd6 4.d4
>					Kd8 5.Bb5 Kc7 6.Bf4 Kb6 7.Bxd6
>					Kxb5 8.Qc8 Kb6 9.Na3 Ka5 10.b4+
>					Kb6 11.Bc5#
>17:12:32	4/19	Mate11	1533143766	1.e4 Qd4 2.Qg4 Ke7 3.Nf3 Qd6 4.d4
>					Kd8 5.Bb5 Kc7 6.Bf4 Kb6 7.Bxd6
>					Kxb5 8.Qd7+ Ka6 9.Nc3 Kb6 10.Bc5+
>					Ka6 11.Qa7# SS=12

Wow!

I had tried Chest with it, but "no mate in 9" needs already an hour, so I
stopped to dig deeper.  And if it's really a mate in 11, that will take
some time for Chest, since the EBF is > 10.
I estimate at least 100 hours (4 days), and I'm not going to do it.

In case you did not yet... you should send a note to Valentin Albillo
about your discovery.  May be that causes him to update his pages :-)

Cheers,
Heiner



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