Author: Torstein Hall
Date: 04:48:50 01/21/02
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On January 21, 2002 at 06:39:35, Uri Blass wrote: >On January 21, 2002 at 06:19:56, Torstein Hall wrote: > >>On January 20, 2002 at 09:41:48, David Rasmussen wrote: >> >>>On January 20, 2002 at 09:29:24, Severi Salminen wrote: >>> >>>>On January 20, 2002 at 09:01:50, David Rasmussen wrote: >>>> >>>>>There must be a value system of material that takes care of all special cases. >>>>> >>>>>1,3,3,5,9: >>>>> >>>>>Has the following problems: >>>>>3 pawns for bishop or knight is almost always a bad idea. >>>>>2 knights/bishops for rook and pawn is almost always a bad idea. >>>>>2 rooks for queen is often not a good idea. >>>>>3 knights/bishops for a queens is often not a good idea. Then again, often it is >>>>>:) >>>>> >>>>>What is your best bet? >>>> >>>>And sometimes a Bishop is better than a knight. So: >>>> >>>>P=1, B>N>3*P, R+P>2*B, Q>2*R and Q>3*B. >>>> >>>>So maybe P=1, N=3.2, B=3.4, R=6, Q=13? >>>> >>>>Severi >>> >>>I don't want to score bishop higher than knight. It depends on dynamic factors >>>that should be in evaluation anyway. I just want to avoid extra code to evaluate >>>special cases, as Crafty does. I think it is possible. >>> >>>/David >> >>Is the Bishop pair a special case? Theyb are better in about 80-90% of all >>practical games.I think that should score 7p together if a bishp is 3. > >I prefer bishop, knight and pawn and not 2 bishops > >It may be interesting to do comp-comp games to check if I am right(white play >without knight at b1 bishop at c1 and pawn at a2 > >black plays without 2 bishops(c8,f8) >I expect black to have better chances. > >Uri Interesting experiment. But I'm not sure if the pawn on a2 (or h2) is the right one to take away. It will add quite a lot to the mobility of the rook. Perhpas the one on b2? Anyway, I see if I can set up a comp - comp match when I'm home this evening. Torstein
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