Author: Baier Helfried
Date: 02:45:04 02/16/98
Go up one level in this thread
On February 12, 1998 at 09:35:00, Robert Hyatt wrote: > > >Actually, almost all of the 4 piece files are not needed. KQQK is >obviously >one. But deleting them causes one embarassing problem: If you reach a >KQPK ending, it will see "mate in N" from that tablebase. But once it >pushes the pawn to the 7th, it might not promote it if the KQQK >tablebase is >not available. It is possible it can't see deeply enough to see the >mate >in a blitz game (should be no problem in normal time controls). What >will >happen is that it will check like mad with the queen, which keeps it in >the tablebase and keeps it seeing "mate in N". It will do this until >either a repetition threat or 50-move rule forces it to promote to avoid >the draw score. > >So it would probably win, but not "prettily". And it is possible that >by >the time it checks for 50 moves, it can't get back to the right position >where it can force the promotion without repeating for a third time. > >bottom line: keep 'em all, only 250mb. Disk is cheap. :) Oh, I understand. 4 piece files are only 'little' tools for the 5 piece files. But where can I find this 5 piece files? For example KNN-kp On ftp://news.cis.uab.edu/pub/hyatt/TB/ I could find only some of this.
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