Author: Will Singleton
Date: 12:37:25 11/02/98
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On November 02, 1998 at 04:05:51, Frank Schneider wrote: >This was a bug that I was not able to reproduce till now :-( >It could be something in my WinBoard-code, possibly in combination with >pondering, but so far I couldn't find anything. >At home Gromit always wants to play Qe5. Sorry that the bug costed half >a point. > >Frank I had just such a bug. On the servers, Amateur would play a crappy move now and then (more crappy than usual :)), but I couldn't reproduce the bad move offline. Since I couldn't reproduce it, I couldn't fix it for a good while. So I eventually had to write some code to mimic a server session, replaying a suspect game with the same time control, taking the same time to move that the opponent had in the original game, etc. Turned out to be a problem with the way pondering used the hash tables, and taking back the move if the guess was wrong. Will
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