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

Author: Steve Maughan

Date: 16:23:55 07/18/05

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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



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