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Subject: Re: Mate in 10..........Qh5+

Author: marc sachet

Date: 01:16:43 07/19/05

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On July 18, 2005 at 19:23:55, Steve Maughan wrote:

>Terry & Rob,
>
>>>[D]2qrr1n1/3b1kp1/2pBpn1p/1p2PP2/p2P4/1BP5/P3Q1PP/4RRK1 w - - 0 1
>
>>This is a better test for old dedicated units. I'd repost it for Steve and
>>other fans;-)
>
>I'd agree.  It's quite a famous position - I've certainly seen it here before.
>Engines that handle checks well find the solution quickly.  Here's Fruit and
>Glaurung's analysis on a Centrino 2 GHz with 256 Mb of Hash:
>
>
>Engine: Fruit 2.1 (256 MB)
>by Fabien Letouzey
>
>5/27   0:00   +0.96    1.exf6 Nxf6 2.Qh5+ Kg8 3.fxe6 axb3
>                       4.Qf7+ Kh7 5.exd7 Rxd7 6.Rxe8 Qxe8
>                       7.Qxe8 Nxe8 (104.463)
>
>5/29   0:00   +M10     1.Qh5+ Nxh5 2.fxe6+ Kg6 3.Bc2+ Kg5
>                       4.Rf5+ Kg6 5.Rf6+ Kg5 6.Rg6+ Kh4
>                       7.Re4+ Nf4 8.Rxf4+ Kh5 9.Rg3 Bxe6
>                       10.Bg6+ (302.045)
>
>
>2qrr1n1/3b1kp1/2pBpn1p/1p2PP2/p2P4/1BP5/P3Q1PP/4RRK1 w - -
>
>Engine: Glaurung 0.2.4 (256 MB)
>by Tord Romstad
>
>6.00   0:00   +2.98    1.Qh5+ Nxh5 2.fxe6+ Kg6 3.Bc2+ Kg5
>                       4.Rf5+ Kg6 5.Rf6+ Kg5 6.Rg6+ Kh4
>                       7.Re4+ Nf4 8.Rxf4+ Kh5 9.Rxg7 Bxe6
>                       10.Bd1+ Bg4 11.Bxg4+ Qxg4 12.Rgxg4 (77.971) 384
>
>7.00   0:00   +M12     1.Qh5+ Nxh5 2.fxe6+ Kg6 3.Bc2+ Kg5
>                       4.Rf5+ Kg6 5.Rf6+ Kg5 6.Rg6+ Kh4
>                       7.Re4+ Nf4 8.Rxf4+ Kh5 9.Rxg7 Bxe6
>                       10.g3 Bg4 11.Bg6+ Kg5 12.Bxe8+ (98.962) 373
>
>8.00   0:00   +M12     1.Qh5+ Nxh5 2.fxe6+ Kg6 3.Bc2+ Kg5
>                       4.Rf5+ Kg6 5.Rf6+ Kg5 6.Rg6+ Kh4
>                       7.Re4+ Nf4 8.Rxf4+ Kh5 9.Rxg7 Bxe6
>                       10.g3 Bg4 11.Bg6+ Kg5 12.Bxe8+ (152.838) 407
>
>9.00   0:00   +M12     1.Qh5+ Nxh5 2.fxe6+ Kg6 3.Bc2+ Kg5
>                       4.Rf5+ Kg6 5.Rf6+ Kg5 6.Rg6+ Kh4
>                       7.Re4+ Nf4 8.Rxf4+ Kh5 9.Rxg7 Bxe6
>                       10.g3 Bg4 11.Bg6+ Kg5 12.Bxe8+ (303.302) 431
>
>10.01  0:01   +M10     1.Qh5+ Nxh5 2.fxe6+ Kg6 3.Bc2+ Kg5
>                       4.Rf5+ Kg6 5.Rf6+ Kg5 6.Rg6+ Kh4
>                       7.Re4+ Nf4 8.Rxf4+ Kh5 9.g3 Rxe6
>                       10.Rh4+ (784.202) 452


it's an A. Alekhine combination during a simultaneous display (!)



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