Author: Tony Werten
Date: 06:30:11 02/10/06
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On February 09, 2006 at 19:22:58, Dann Corbit wrote: >On February 09, 2006 at 16:43:15, Tony Werten wrote: > >>On February 08, 2006 at 12:24:45, Dann Corbit wrote: >> >>>On February 08, 2006 at 12:18:50, Emil Vlasak wrote: >>> >>>>Is there any possibility to access kpp-kpp tablebase, on-line or via download? >>>> >>>>By the way, it is very frequent constellation. >>>>http://kd.lab.nig.ac.jp/chess/discussion-board/viewtopic.php?t=74 gives the >>>>following frequencies of 6 men: >>>> >>>>1 krppkr 27,902 14.029% >>>>2 krpkrp 25,779 12.962% >>>>3 kppkpp 19,150 9.629% >>>>4 kpppkp 8,474 4.261% >>>>.... >>> >>>I imagine that nobody has built that one yet because you clearly must have all >>>of the tablebase files that live underneath (which is every onther one with each >>>and every 'p' replaced by 'r', 'n', 'b' and 'q' in every combination.) >>> >>>So that particular 6 man tablebase file is the hardest one of all to make. I >>>also guess it will be stupendous in size. Probably the largest 6 man table base >>>file. >> >>Don't think so. It only has at most 1806*24*48*23*46 entries. With 2 byte per >>entry, that's 4GB uncompressed. > >My mistake. I thought (for some reason) that tablebase files with pawns tended >to be larger than tablebase files with pieces. Depends on how many pawns there are. Without pawns, kings can be placed at 462 positions, with pawns at 1806. OTOH pieces can occupie 64 squares, pawns 48. For kppkpp the two times 2 the same pieces also reduce the index a lot. In contrast, I'm pretty sure KQPkrn is quite a big tablebase. Tony
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