Author: blass uri
Date: 22:56:01 09/18/98
Go up one level in this thread
On September 18, 1998 at 21:55:29, Robert Hyatt wrote: >On September 18, 1998 at 17:44:44, Mark Young wrote: > >>On September 18, 1998 at 12:35:09, Bruce Moreland wrote: >> >>> >>>On September 18, 1998 at 04:21:10, blass uri wrote: >>> >>>>No it does not find the right moves but I do not think that my 16 bit version is >>>>the last version. >>>>I told amir ban about a bug in the evaluation of king ,wrong bishop and more >>>>than one pawn against a king(it does not know that 2 pawns are not better than >>>>1) and I do not know if he fixed it. >>>>I think also that Junior5 cannot find it because it does not understand the idea >>>>when there are rooks but I am not sure about it. >>>> >>>>I am not sure if it is a draw even after gxh3 but the right move is 47.g3 and >>>>Junior cannot find it >>>>Junior could not find 46...h3 and prefered a3 >>> >>>I think that if it is not a draw after gxh3, there would have to be a study-like >>>conclusion. >>> >>>If the pawns are stripped off it is a draw, since RB vs R is drawn in the >>>typical case. If the rooks are traded, it is a draw because of the "impotent >>>pair". If the B is sacrificed for the two pawns somehow it is a draw because >>>the two pawns up R+P ending would be easily drawn. >>> >>>The only way it can be won is if white can advance an h-pawn, with or without >>>winning the g-pawn (one h-pawn can be traded for it if necessary), without >>>trading any pieces, and without allowing counterplay via the a-pawn. >>> >>>Seems like an extremely tall order to me. >>> >>>This is a typical Crafty endgame zap. It has been doing this for years. >>> >>>bruce >> >>I don't now how typical it is for crafty to do this at blitz time controls, but >>typical or not it was a cool zap. And I don't know of any other program that >>would play h3. I liked it. >>(Crafty was running on a P II 233, Frizt 5 was running on a P II 400) > > >it sounds like a tablebase + evaluation connection. Tablebases to know that >KRB vs KR is a draw sometimes KRB vs KR is draw but sometimes it is not I am not sure if after gxh3 it is a draw because if white have king rook bishop and pawn against king and rook white has a chance to win. I think that in this case white can take the passed pawn of black without exchanging rooks and after it win with king rook wrong bishop and pawn or two against king and rook. The idea is not to exchange the rooks and go with the king before the passed pawn Uri , and it has specific knowledge about K vs B with rp of the >wrong color (or two or even 4 rook pawns on the same file)... > >sometimes it works...
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