Author: Robert Hyatt
Date: 07:21:01 11/13/01
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On November 13, 2001 at 04:22:02, Uri Blass wrote: >On November 13, 2001 at 03:22:13, derrick gatewood wrote: > >>How much time and space would it take to compile the tablebase for an endgame >>where each side had 3 pawns? would this be possible or it simple to large? > >It is too large > >7 piece tablebases are too large to build and you need all the other 8 piece >tablebases when both sides have 4 pieces in order to build the tablebase that >you ask. > >I can see only special exceptions when it may be easier to build the 8 piece >tablebases(cases when the pawns are blocked) and even in these cases you need >the 7 piece tablebases because the king can capture pawns. > >I think that it may be possible to build the tablebases that you ask for in a >very specific case when all the pawns are blocked and on the same file >it means for example that white has pawns at a2, a3, a4 when black has pawns at >a5, a6, a7 >It can be also a different file. > >In this case you do not need to care about promotions because promotion can be >possible only if the 3 pawns of one side are captured but in this case the >result is known by the KPPP vs K tablebases. > >The number of relevant position to build is relatively small but unfortunately >these tablebases are not very important. > > It >>seems like it would be so large since pawns dont have much movement. Has this >>already been performed so I dont have to waste my time? The "Little Game" as it >>is called on chess.net is my nemesis and I really want to figure out this game >>and that tablebase would be all I would need to study it in depth. > >I believe that yace with the existing tablebases can find the right move in >almost every KPPP vs KPPP endgame by search in a short time. > >It may be interesting if someone can post a position that it cannot find the >right move in an hour on your hardware. > >Uri I can guarantee you it can't. This is not hard for a human, but it is all about zugzwang and it is deep enough that programs can't solve it today. Even with position learning.
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