Author: Dusan Dobes
Date: 08:38:41 09/15/98
Go up one level in this thread
On September 15, 1998 at 02:21:14, Kai Skibbe wrote: >On September 15, 1998 at 02:11:10, Heiko Mikala wrote: > >> >>On September 15, 1998 at 01:58:33, Kai Skibbe wrote: >> >>>On September 14, 1998 at 17:04:40, Heiko Mikala wrote: >>>> >>>Hi Heiko, >>> >>>I have played several games between Crafty and Phalanx17 and I think >>>Phalanx has a bug so it will loose many games in a match game (/mg=x). >>>It has happened that Phalanx scores 6-2 against another engine at blitz level >>>and than loose the rest of the games. When you take a look at the pgn-file >>>you see that Phalanx looses in <=40 moves. Sometime <=20 (!!). >>>Because of this I only play Phalanx with /mg=1 against other machines. So I >>>get very good results for Phalanx and I think it is very strong. >>>Could you please test it with the option /mg=1 and post or email me your >>>experiences ? >> >>Hi Kai, >> >>yes I found out about the bug too. It happens, whenever Phalanx plays many games >>in a row, without beeing restartet - for example in match-game mode in Winboard. >>The bug is, that it will stop thinking, it will play it's moves immediately >>without using it's time. >>Because of this I decided to play all Winboard matches with the flags /-reuse >>and /-reuse2. In this way the engines are restarted for every new game, instead >>of only starting a new game with the 'new' command using the same engine. >>I had no problems with Phalanx since then. I cannot reproduce this bug here with Linux and Xboard. I cannot currently test it on a Windows machine. I'd like to see the debug log if anyone is willing to create it (via "winboard /debug ...") and mail it to me. I recommend using xboard/winboard with -xreuse flag anyway. The idea of reusing chess program without some synchronization is incorrect. Xboard assumes the engine is ready to play new game right after it sends the 'new\n' string. If you are fast enough with 'Reset game' +'Two machines' you can get xboard totally confused, especially on a slow machine. I tried this with crafty, phalanx, and gnuchess. >>And yes, I too think, that Phalanx is very strong, I'm looking forward to >>testing version XVIII ! XVIII should be stronger (especially at blitz against computers) than XVII. XVII had bug in static exchange evaluator that sometimes caused pruning safe captures and checks in quiescence search. Phalanx XVIII is available at ftp://ftp.math.muni.cz/pub/math/people/Dobes/phalanx-18.tar.gz ftp://sunsite.unc.edu/pub/Linux/games/strategy/phalanx-18.tar.gz Win32 binaries compiled with CygWin beta 19: ftp://ftp.math.muni.cz/pub/math/people/Dobes/winphx18.zip Dusan
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.