Author: Dann Corbit
Date: 20:43:07 01/05/99
Go up one level in this thread
On January 05, 1999 at 23:00:31, Robert Hyatt wrote: >On January 05, 1999 at 18:44:59, Dann Corbit wrote: > >>On January 05, 1999 at 11:05:46, Matthew Herman wrote: >>[snip] >>>Here is another of one of those positions 5k1K/7P/8/8/8/8/8/N7 w - - >>>It is drawn as white (with the knight) cannot "lose a tempo" and drive the king >>>away from f7/f8. (with black to move or the knight on a2 it is a win). >>>Programs don't see this either (Junior at depth 60 says +6.96) >>> >>>Also as Hyatt said.. if it is in the tablebase it knows if it is drawn or a win >>>.. and will say drawn at root etc.. (this is what fouled me up when using crafty >>>under the winboard adaptor to get access to the tablebases via chessbase (it >>>wouldn't show = 0.00 at the drawn positions but rather say +2.00 (in a KRKB >>>drawn ending)) >>You raise a good point. I wish that when the chess engine *knows* the position >>is drawn, that it would report a ce of 0.00. To report (e.g. +2.0) different >>values is clearly incorrect. I don't care if it wants to continue to try to >>pull out a win and hope for a mistake. But it should not report an erroneous >>conclusion. > >this will be fixed in 16.4... there are two alternatives. first, in analyze >mode or when annotating games, "swindle mode" is disabled. Second, a new >command (swindle off) will disable this even when playing... Pretty please, down on my knees... Could you also fix the epd processing error for when you have a single forced move? The ce is always given as zero, but almost always should be something else. Example: r2qkbnr/ppp2Bpp/3p4/4N3/4P3/2N5/PP3PPP/R1Bb1RK1 b kq - The reported value of 0 is only off by -32765. E:\crafty\Release>crafty2 EPD Kit revision date: 1996.04.21 unable to open book file [e:/crafty/release/book.bin]. book is disabled unable to open book file [e:/crafty/release/books.bin]. search time set to 770.00. using cpu time Crafty 16.3 vs ferret pondering enabled. EGTB cache memory = 16M bytes. hash table memory = 48M bytes. pawn hash table memory = 8M bytes. play best book line after search. EGTB access enabled using tbpath=e:/crafty/release/tb 4 piece tablebase files found Crafty v16.3 White(1): epdpfga epd.epd epd.out PFGA: EPD record: 1 Black(1): quit execution complete. E:\crafty\Release>type epd.out r2qkbnr/ppp2Bpp/3p4/4N3/4P3/2N5/PP3PPP/R1Bb1RK1 b kq - acd 1; acn 1; acs 1; ce 0; pv Ke7;
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.