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Subject: Re: Find the nice win - test

Author: Dieter Buerssner

Date: 13:47:55 02/18/04

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On February 18, 2004 at 10:15:28, Mihaly Szalai wrote:

>1knB4/8/7p/5R2/7K/8/3r4/7B w - - 0 1
>
>White has a very nice play here:
>1. Rb5+ Nb6 2. Bxb6! Rh2+ 3. Kg4! Rxh1 4. Bg1+! Kc7 5. Rb1! Kd7 6. Re1 Kc6 7.
>Rd1
>Kb5 8. Rc1 Ka4 9. Rb1 +-
>
>I wonder how many engines can see this line and how fast.

Very nice position - thanks! I tried Yace for some time (a bit over one hour),
and it would not come up with a convincing line. It sees Rb5 Nb6 Bxb6 Rh2 fast,
but does not show Kg4, when I analyse from the root. When I force those 4 half
moves, it will find Kg4 in reasonable time. But after Rxh1, it will fail for
Bg1. I guess, it would find Bg1 in an hour or so. I can confirm, that your line
is correct. After analysing from back to front, yace shows a mate score (I did
not log it, IIRC it was mate in 27).

Regards,
Dieter



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