Author: Andreas Herrmann
Date: 15:24:25 01/30/04
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On January 30, 2004 at 16:59:43, Ulrich Tuerke wrote: >On January 30, 2004 at 13:22:45, Andreas Herrmann wrote: > >>On January 30, 2004 at 12:55:45, Ulrich Tuerke wrote: >> >>>Andreas, are you also checking for repetitions when you are in quiescence search >>>? >>> >>>Uli >> >>Hi Uli, >> >>no i don't, because i search only capture and promotion moves inside the qsearch >>and there can't be a repetition. Perhaps i will try to generate also check moves >>in quiescence search in the future. Have never tryd it sofar. > >I think that you are right: in case you have captures and promotions only, no >repetition can happen. Comet also generates some checks in quies search. > >In fact, I try a little trick: in case the same piece gives 3 checks in series >without a capture in this line, I cut the line after the 3rd check and return a >zero score, provided this series is not too close to the root - and also >depending on the iteration number. The required distance to the root grows with >the iteration number. This helps in some rare cases to detect a perpetual one >ply earlier. But one has to be very careful with this because it implies a >certain risk. > >Uli >> >>Andreas Hi Uli, it seems you are doing something similar, than i have tryd in the past. Ok i have not looked if it was the same checking piece. After the IPCCC i will see, if i can find a solution in my engine. Thanks for sharing your idea. see you in 2 weeks Andreas
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