Author: Heiner Marxen
Date: 14:24:18 09/19/01
Go up one level in this thread
On September 19, 2001 at 10:50:57, Tim Foden wrote: >On September 19, 2001 at 08:33:51, Tim Foden wrote: > >>On September 19, 2001 at 07:50:10, Heiner Marxen wrote: >>>Summarizing: we have one disagreement, which implies a bug. >>>I will inspect that later, and tell you, why Chest thinks that your >>>mate-in-6-PV is not correct. >> >>I agree with Chest. I don't believe that your program has a bug... I believe >>that mine does :-/ >> >>I have suspected this since we had a similar disagreement about mates for one of >>Leonid's test problems. This was months ago. GLC also has a problem with >>Fine70. Somewhere there is a search/hashing bug in GLC, but I'm buggered if I >>can find it :) (and I have been trying to find it). I will keep looking though. > >OK, I think I found the bug with respect to finding mates. GLC now says: > > 7 3.63 +Mate07 2517274 Rh4+ Kxh4 Qh7+ Kg5 f6+ Kg4 f5+ Kg5 Kg7 cxd6 Qg6+ > Kh4 Qg4# > >Which agrees much better with Chest. Fine! Case closed (for me). >However, the fix I made only affects CheckMates, so Fine70 still has a bug for >me. :) Such is the life as a programmer: you never catch the last bug. Being bug free is even more important for Chest, and I try hard to achieve that, but still I continue to find long standing bugs from time to time :-( Good luck on your bug hunt! Heiner
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.