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[Bug-gnubg] Deterministic vs non-determinstic noise

From: Bern Hamilton
Subject: [Bug-gnubg] Deterministic vs non-determinstic noise
Date: Wed, 16 Sep 2009 17:22:18 +0300

I let two gnubg players play each other in a long money session and also in a few 64 point matches. Both played with 0-ply with 0.040 noise, with one having deterministic noise and the other non-deterministic.

Then, using 0-ply 0.040 deterministic noise analysis settings, I analyzed all the moves and cube decisions. I expected the player with deterministic noise to have 0 error rating in both, chequer and cube play, and the one with non-deterministic noise, some chequer and cube errors.

To my surprise, both had perfect chequer play and both had errors in cube decisions.

So, two questions:

Why didn't the non-deterministic player produce errors in chequer play?
Why did the deterministic player produce errors in cube play?

Maybe I'm not understanding what the random noise is intended to achieve.

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