Author: Ulrich Tuerke
Date: 13:59:43 01/30/04
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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
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