Author: José de Jesús García Ruvalcaba
Date: 02:14:13 11/19/01
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On November 18, 2001 at 09:43:11, Rafael Andrist wrote: >On November 18, 2001 at 06:03:57, Uri Blass wrote: > >>On November 18, 2001 at 05:51:03, Rafael Andrist wrote: >> >>>According to the knnnk.tbs file, ~ 85,3% of the possible KNNN-K positions are >>>won. Is this enough to consider KNNN-K as a general win? Or can at least be said >>>that there's a high chance for a win? >>> >>>Rafael B. Andrist >> >>It is enough to consider KNNN vs K as a general win. >> >>I doubt if there is a KNNN vs K drawn position when the weaker side cannnot >>force capturing the knight or getting a stalemate in a few moves. >> >>Uri > >Thanks. I the meantime I checked some positions in the TB's and saw that even >the ones where Black has a positional advantage are won for White if there isn't >a forced capture or a stalemate. > >e.g. >[D]N6N/8/8/4k3/8/8/8/K6N w - - dm 20; >(Black to move draws because of capturing a knight) > >or >[D]8/8/5k2/8/8/8/NK6/NN6 w - - dm 17; > >Because the win is not easy to find by search but not impossible, I think I will >use an value between +2 and +4 [pawns] for this kind of positions. > >Rafael B. Andrist This win is very easy for a human. For a computer, just try to corner the opposite king and you will eventually find the mate (it is a lot easier than KBN vs K). José.
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