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Is Rybka Growing Weary?

Is Rybka Growing Weary?

Only Chess

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Originally posted by HomerJSimpson
your right 2.2 isnt due out for another two months
I guess someone confused you by labelling the download 2.3?

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100 games have been played and right now, Rybka 1.2f is leading with 57% (~50 elo difference)

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Originally posted by exigentsky
I've been running several 15 10 games between Rybka 1.2f and Rybka 2.1c and the results are surprising. Rybka 1.2f is actually leading the way. Of course, so far, only 7 games have been played and it could just be bad luck for Rybka 2.1. ;p However, could it be possible that Rybka has grown weaker with the new version?!
Yes, on my computer Rybka 2.1 only wins 74% (and this is a perfectly legal version!!!)

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What settings and what engine is it facing?

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Originally posted by exigentsky
What settings and what engine is it facing?
A combination of different engines, the best being Spike 1.2 and TogaII. All engines have the same settings, 128 mb of RAM and 15 minutes on the clock.

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Originally posted by LanndonKane
All engines have the same settings, 128 mb of RAM and 15 minutes on the clock.
Are you using their respective books?

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After 710 games, the result is that Rybka 1.2f scores 50.4% against Rybka 2.1c. Thus, it seems that Rybka 2.1 isn't any weaker after all.