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Subject: Re: At depth 12

Author: Daniel Jackson

Date: 13:20:34 09/19/04

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On September 19, 2004 at 13:59:24, Dadi Jonsson wrote:

>On September 18, 2004 at 15:59:24, Daniel Jackson wrote:
>
>>[D]rnbqkbnr/qqqqqqqq/8/8/8/8/QQQQQQQQ/RNBQKBNR w
>>
>>If someone has superfast hardware and a program that excels at mates please run
>>this position, to find the shortest mate....whomever moves first will win.
>>
>>Daniel
>
>Shredder 8 (Chess Assistant 7.1), 512mb hash, dual opteron 248, 2GB, Win XP Pro
>(service pack 2):
>
>[+12.33]  d=12  1.Qaxf7+ Qgxf7 2.Rxa7 Qxa7 3.Qhxc7 Qaxf2+ 4.Qgxf2
>                 Q8xc7 5.Rxh7 Rxh7 6.Qxf7+ (13:26.39)
>[+12.04]  d=12  1.Qaxf7+ Qgxf7 2.Rxa7 Qcxh2 3.Rxb7 Qxf2+ 4.Qgxf2
>                 Qxd2+ 5.Qcxd2 Qxf2+ 6.Kxf2 Qf5+ 7.Ke1 Qxd2+ 8.Qbxd2
>                 Qxe2+ 9.Q1xe2+ Be6 10.Rxh8 (12:19.35)
>[+11.79]  d=11  1.Qaxf7+ Qgxf7 2.Rxa7 Qcxh2 3.Rxb7 Qxf2+ 4.Qgxf2
>                 Qxd2+ 5.Qcxd2 Qxf2+ 6.Kxf2 Qf5+ 7.Ke1 Qxd2+
>                 8.Qbxd2 (7:05.16)
>[+11.34]  d=11  1.Qaxf7+ Qgxf7 2.Rxa7 Qcxc2 3.Qd1xc2 Qxa7 4.Qhxh7
>                 Qaxf2+ 5.Qgxf2 Qxf2+ 6.Kxf2 Qd4+ 7.Qbxd4 Qxd4+
>                 8.Qxd4 Qe3+ 9.Bxe3 (6:43.39)
>[+11.09]  d=10  1.Qaxf7+ Qgxf7 2.Rxa7 Qcxc2 3.Qd1xc2 Qxa7 4.Qhxh7 Q
>                 axf2+ 5.Qgxf2 Qxf2+ 6.Kxf2 Qd4+ 7.Qbxd4 Qxd4+ 8.Qxd4
>                 Qe3+ 9.Bxe3 (2:04.51)

Thank You for your input. I'm still trying to decide whether the *Key* move is
Qaxf7+ or Qfxf7+...

Qaxf7+ wins material, but it may not be the *Key* to the shortest mate.

Daniel



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