Author: Omid David Tabibi
Date: 13:35:01 07/14/04
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On July 14, 2004 at 16:13:20, Russell Reagan wrote: >On July 14, 2004 at 12:56:10, Omid David Tabibi wrote: > >>>I can easily reproduce all critical moves of the Falcon-Crafty game on my >>>notebook for black. I already asked you in another message if more time would >>>have made any difference for Falcon for two of its critical mistakes - you >>>didn't answer yet. > >>Just count the number of times Crafty changed the PV after 1/4 of its thinking >>time (including pondering), and see how many of them were critical, and >>prevented a loss. >> >>You will find many of them. Here is one I remember clearly: After Falcon's >>...Ra5 in the endgame, Crafty wanted to repeat the position at first (score: >>0.00). It thought for a long time, and then changed the PV to other move, which >>was winning. But you will find many other moves in the earlier stage of the >>game, which would have resulted in a loss were they played (after thinking for >>1/4 of the time). > >Your proposal was to give everyone quad Opterons, so Crafty would play the same >moves. So talk about giving Falcon 4x the time, not giving Crafty 1/4th the >time. > >You still didn't answer his question. If Falcon had used 4x the time, would it >have avoided the mistakes and avoided losing the game? I haven't analyzed the whole game in detail (giving 4x thinking time), so I can't be certain that there was a clear winning move. But having 2x the time Falcon would have avoided that Ra5 blunder in the endgame and would at least draw the game. > >What about the game vs. Junior? Falcon had a good position and could have at >least got a draw. Would 4x the hardware have avoided, say, f5 and played Nf4 >instead? Just as Falcon played ...f5, there was a massive score drop, meaning that had it seen one iteration deeper it would have avoided that move. For one iteration deeper about 2.5-3x speedup is needed, so 4x speedup would have surely avoided the move. The same happened against Diep, with a massive score drop coming just as a move was played. The only loss of Falcon which had nothing to do with hardware was against Deep Sjeng. Falcon simply played a bad variation with horrible statistics for black, and its desperate exchange sacrifice was no good.
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