Author: Tony Werten
Date: 03:40:53 02/02/05
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On February 02, 2005 at 05:32:00, George Tsavdaris wrote: >On February 02, 2005 at 01:06:30, Robert Hyatt wrote: > >>On February 01, 2005 at 21:39:40, Anthony Cozzie wrote: >> >>>Is there any chance of some 6-man tables becoming available before CCT? My wish >>>list is actually pretty small: >>> >>>KRPKRP (only the white-side is available from Bob right now?) >> >>think about it. If pieces are symmetric you only need one side. Just turn your >>white pieces into black ones, and the black ones into white ones, and look it >>up. :) > > Actually, this is what i thought the first time i saw there are tablebases for >white and for black, for the same endgame(KRPKP for example). So i thought they >would have the exact same size. But no, this isn't happening. >For example KBBKNBB.EMD is 200 KB, while KBBKNBW.EMD is 243 KB. >Can you explain why..........????????? It seems very bizarre to me!?!?!?!?! The indexsize is shrunk by removing unblockable checks. If white to move, black cannot be in check, meaning at most 4 squares can be removed from the possible squares where the white bishop can stand on. ( ie if Black king on d4, no bishops can be on c5,e5,c3 and e3. If black to move, white çannot be in check, but because of the Bishop and Knight, at most 12 squares can be removed. That's why the BTM egtb is smaller than the WTM egtb. Tony > >> >> >>>KRPPKR >>>KQPKQP >>>KQPPKQ >>>KRKPPP >>>KNPPKR >>>KBPPKR >>>KBPKNP >>>KRPPKQ >>> >>>There are a few others that I wouldn't mind having, but those are the really >>>useful ones that come to mind. I guess the above would total 30GB or so, which >>>is a fair bit but not completely outrageous. >>> >>>anthony
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