Author: Albert Silver
Date: 11:22:06 12/25/05
Go up one level in this thread
On December 25, 2005 at 14:00:34, Vasik Rajlich wrote:
>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
Here's an oddity I ran accross:
[D]2k4r/6R1/p1p1P3/8/2P5/P7/1P3r1p/1K5R b - - 0 54
For some reason, Rybka can't seem to find 54...Re2 in a reasonable time,
contrary to other engines. It insists on Kd8 which loses quickly.
Albert
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