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Subject: Re: Mate in 11?

Author: Heiner Marxen

Date: 09:15:22 08/02/02

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On August 01, 2002 at 15:30:52, John Merlino wrote:

>I remember that some people here occasionally ask for long forced mate positions
>from real games. Here is a position from a game that I played with Chessmaster
>9000 on ICC today:
>
>[D]rnb1k2r/pppp3p/6q1/7Q/8/8/PP2BKPP/R1B4R w kq - 0 14
>
>The King announces Mate in 11 in 3:30 on my humble PIII-600:
>
>Time	Depth	Score	Positions	Moves
>0:00	1/3	7.13	3521		14.Qe5+ Kf7 15.Bh5 Qxh5 16.Qxh5+
>					Kg7
>0:00	1/4	7.27	8121		14.Qe5+ Kf7 15.Bh5 Rf8 16.Bxg6+
>					Kxg6+ 17.Bf4 d6
>0:00	1/5	6.93	40177		14.Qe5+ Kf7 15.Bh5 Re8 16.Bxg6+
>					hxg6 17.Qf4+ Kg8 18.Qxc7
>0:00	1/6	7.06	78163		14.Qe5+ Kf7 15.Bh5 Re8 16.Bxg6+
>					hxg6 17.Qxc7 Nc6 18.Qd6
>0:03	1/7	7.12	333743		14.Qe5+ Kf7 15.Bh5 Re8 16.Bxg6+
>					hxg6 17.Qxc7 Nc6 18.Qf4+ Kg8 19.Re1
>0:10	1/8	7.57	995029		14.Qe5+ Kf7 15.Qxh8 Nc6 16.Bc4+
>					d5 17.Bxd5+ Ke7 18.Re1+ Kd6 19.Bxc6
>					Kxc6 20.Qe8+ Qxe8 21.Rxe8
>0:28	1/9	7.55	2682427		14.Qe5+ Kf7 15.Bh5 Re8 16.Bxg6+
>					hxg6 17.Qxc7 Nc6 18.Re1 Rxe1 19.Qf4+
>					Kg8 20.Kxe1
>3:30	1/10	Mate11	20810159	14.Qe5+ Kf7 15.Rf1 Rd8 16.Kg1+
>					Kg8 17.Bc4+ d5 18.Bxd5+ Rxd5 19.Qxd5+
>					Kg7 20.Qd4+ Kg8 21.Qd8+ Qe8 22.Qxe8+
>					Kg7 23.Qf8+ Kg6 24.Qf7#
>4:46	2/11	Mate11	29390348	14.Qe5+ Kf7 15.Rf1 Rd8 16.Kg1+
>					Kg8 17.Bc4+ d5 18.Bxd5+ Rxd5 19.Qxd5+
>					Kg7 20.Qd4+ Kg8 21.Qd8+ Qe8 22.Qxe8+
>					Kg7 23.Qf8+ Kg6 24.Qf7#
>
>I expect somebody with faster hardware can do better.
>
>jm

Impressive!  According to Chest there is no mate in 10
(Athlon 1500+, 128MB hash, 9.2 hours).

Cheers,
Heiner



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