Author: Sune Larsson
Date: 11:29:06 12/25/05
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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 Yes, I see what you mean. Rybka showed +4.02 for 20 moves - then between +3.50-+4.00 for 13 more moves. After that it was a GUI TB-draw. /S
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