Author: Tony Werten
Date: 01:22:36 10/25/04
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On October 25, 2004 at 03:27:00, Ed Schröder wrote: >On October 25, 2004 at 02:36:44, Tony Werten wrote: > >>Hi Ed, >> >>have you made a testrun of 1 game, (hope it reproduces) under the different >>settings. >> >>Most likely the logfiles will show a different (lower) knode speed. I can make >>up several excuses for that. >> >>- At startup, chessengine and interface are fixed to a different processor, >>meaning the second chessprogram gets the load of the interface as well (or any >>other process that the interface initialises). >> >>- Engine 2 is initialised on a crappy memory alignment. >> >>- Time related rounding errors are every time rounded in 1 the first engines >>favor. >> >>- All communication is handled as engine 1 first then engine 2 ( rather than >>engine on the move, engine not to move ) so during the whole game, engine 1 gets >>every information earlier than engine 2 >> >> >>If you feel the need, I'm pretty sure I can come up with some more :) >> >>Tony > > >But my procedure has been always 100% the same except for the loaded engine at >program start. Also I always reboot before I start a match. The issues you >address were valid in match-1, match-2 and match-3, still there is this >difference of 4.7%. > >What happened to Xinix? I can not believe your ranking, has fatherhood troubled >your astuteness? Programming while feeding babies? :) Even with 6 years of experience, 1.5 month isn't enough for a complete rewrite, changing from Delphi to C++, from single to dual and from x88 to bitboards. I could have played with an old version, but that would have been rather pointless. The 2nd weekend was already a lot better, with the engine playing something that resembled chess, but there were still a lot of timing issues and so on. Every now and then, the search would explode, (not returning) and it would continue playing after a timeout of 6 minutes, while only actually having reached 8 ply. It blew a good position against Nexus with 3 of those in a row :( All in all, I'm not unhappy with the result from 2nd weekend. It'll be better next time. Tony > >Ed :)
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