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Subject: Re: No progress possible

Author: Vasik Rajlich

Date: 11:00:34 12/25/05

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On December 25, 2005 at 09:51:18, Sune Larsson wrote:

>>
>>I've already managed to make a rough design of the endgame knowledge solution
>>for Rybka 1.2, and this position won't be covered by it.
>>
>>In the long term, however, an engine should solve this position as well. It's
>>part of the bigger concept of knowing when you can't make progress.
>>
>>Vas
>
>
> Yes, it's important to know when no progress is possible. Like in this position
> which comes from a Nunn ending1 match between Fritz9 and Rybka. Rybka entered
> this position happily, as black, showing + 4.02. But of course it's a draw.
> The white rook is rock solid on f6.
>
> [D]8/4k3/5Rp1/6P1/3K1P2/1P6/8/7q b - - 0 25
>
>
> /S

Yup. Rybka 1.2 will actually do ok here, but there are some deeper questions.
One idea I have thought about a little bit is that an advantage should grow over
time (ie with more search). I think it's true of every serious advantage, but
the opposite may be true of small advantages.

Vas




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