Author: Robert Hyatt
Date: 21:22:11 10/02/98
Go up one level in this thread
On October 02, 1998 at 21:24:51, blass uri wrote: > >On October 02, 1998 at 20:47:47, Robert Hyatt wrote: > > >>because crafty doesn't evaluate KPP vs K or KP vs KP as won, in that >>position. > >KP vs KP is not relevant >and I assume that KPP vs K is evaluated as at least 1 pawn advantage in every >position even if the black king can get into the square of the white pawn. > >I understand now that you use crafty15.21 and not crafty15.20 so if my >assumption is right then crafty15.20 will play Rxb2 with tablebases at depth=12 >and you did an important improvement with the new extension stuff. > >Uri first, you are making a gross assumption when you say "KP vs KP is not relevant". Remember that this is a deep search, full-width. So this particular database gets hit about 10,000 times during my 12 ply search. Others also get hit heavily including KPK and KPPK... I didn't try this on 15.20, because at the time, it didn't seem to be highly relevant, since the first position you gave, after 8 plies resulted in a position that was an announced mate almost instantly.... by "after 8 plies" I mean the original position, then following the analysis you gave starting with rxb2, for 4 full moves, and then doing the first search I reported...
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.