Author: Vincent Diepeveen
Date: 11:30:22 02/01/05
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On February 01, 2005 at 14:22:26, Thomas Mayer wrote: >Hi Vincent, > >On February 01, 2005 at 14:05:50, Vincent Diepeveen wrote: > >>On February 01, 2005 at 14:02:18, Vincent Diepeveen wrote: >> >>>On February 01, 2005 at 12:20:30, Thomas Mayer wrote: >>> >>>You mean like this? >>> >>[D]8/8/P4b2/2K3k1/8/8/8/8 b - - >> >>1-0 >> >>Whereas : >>[D]8/8/P4b2/2K3k1/8/8/8/b7 b - - >> >>Is a draw. >> >>And if you remove the f6 bishop it's a win for white again. > >thanks... your example kills my second idea... so I must return failure when 2 >bishops are present... I could create rules which even would cover those >problems, but for a fast routine they would be to complicate... > >It's always good to have an FM handy... :) Thanks. The question is where you worry about. If you have a 5 men EGTB already who cares about extrapolating 4 men info from a 5 men egtb? More interesting is the reverse. Whether a 6 men EGTB can tell truths about a 7 men endgame :) However the only interesting cases you can't guess anyway. Like if you have KRPP KR which is a win, then sure KRPPP KR in that pos is a win too. But if you already had a positive score and now another pawn which is probably at 7th rank or so, your score is already +5.0 or similar statically. So difficult egtb extraction code is not useful there. More interesting would be whether when having a KRPP KR position that's won whether adding a piece or pawn for the KR side is still a win for KRPP. However KRPP KRP is not trivial to judge based upon KRPPKR. So writing code for that is nonsense too. Just get the EGTB as soon as it's there :) My only tip to you is start downloading today :) >Greets, Thomas
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