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Subject: Re: another mate-in-16 from the archives...

Author: Tony Werten

Date: 03:50:39 03/30/05

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On March 30, 2005 at 06:47:25, F. Huber wrote:

>On March 30, 2005 at 06:21:02, Jouni Uski wrote:
>
>>>8/8/8/2p5/R1P5/P5p1/P3K1p1/6k1 w - - bm #16; 00:00 @ C0/R0/K3/P1/X2;
>>
>>this 00:00 is misleading - actually it takes 00:45 in my P2400 to solution
>>
>>Jouni
>
>Sorry, but also your 00:45 is misleading! ;-)
>
>It depends on what settings you´ve made _before_ starting the automatic mode -
>if you look at the position, it´s clear that ´ChecksOnly´ and ´Threats´ can
>be switched OFF, and if you set ´SearchOrder=XPK´ (which is faster mostly),
>then you get the following:

If you set pv=1.Ra7 Kh1 2.Rh7+ Kg1 3.Kd2 Kf1 4.Rf7+ Kg1 5.a4 Kh1 6.Rh7+ Kg1 7.a5
Kf1 8.Rf7+ Kg1 9.a6 Kh1 10.Rh7+ Kg1 11.a7 Kf1 12.Rf7+ Kg1 13.a8Q Kh2 14.Qh8+ Kg1
15.Qa1+ Kh2 16.Rh7#, you can save the engine even more work.

Tony

>
>ChestUCI Ver.4.0:
>CPU: Celeron 400MHz
>FEN: 8/8/8/2p5/R1P5/P5p1/P3K1p1/6k1 w - -
>Automatic-Search for 1. Special-Mate [C0/R0/K0/P0/X1] in 16 ...  (Hash=50MB)
>Automatic-Search for 1. Special-Mate [C0/R0/K0/P0/X2] in 16 ...  (Hash=50MB)
> 16/16	00:01	          11	0	+M16	1.Ta7
>Mate in 16 found !  (00:00)
>1.Ra7 Kh1 2.Rh7+ Kg1 3.Kd2 Kf1 4.Rf7+ Kg1 5.a4 Kh1 6.Rh7+ Kg1 7.a5 Kf1 8.Rf7+
>Kg1 9.a6 Kh1 10.Rh7+ Kg1 11.a7 Kf1 12.Rf7+ Kg1 13.a8Q Kh2 14.Qh8+ Kg1 15.Qa1+
>Kh2 16.Rh7#
>1. Solution  (Mate in 16)
>
>So with a bit clever setting you will indeed get 00:00 -
>even on my slow Celeron/400! :-)
>
>Regards,
>Franz.

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