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Re: [Bug-gnubg] Removal of absolute fibs ratings

From: Christian Anthon
Subject: Re: [Bug-gnubg] Removal of absolute fibs ratings
Date: Mon, 4 Sep 2006 12:17:50 +0200

The threshold of 0.25 seemed too large for common sense, far too many
doubles very counted as being close, but also the function was plain
stupid and hard to understand. For example all too-good positions were
counted in for some reason. The threshold could be set back to 0.25
for counting of the doubles, but it would still be difficult to guess
the average relation between the old and current versions of the


On 9/4/06, Robert-Jan Veldhuizen <address@hidden> wrote:

On 9/3/06, Christian Anthon <address@hidden> wrote:
> For good order I checked the code, and it is as I suspected, the close
> cube decisions that is used for the calculation of the absolute fibs
> rating (which is what I read from Kees post as well). That was the
> function I changed and that implies that the absolute fibs ratings are
> no longer valid.

Ah sorry, I misunderstood your original post there. So I think we agree, the
formula is based on the close cube decisions count.

However, I didn't know this function was changed after that, "sanitized" as
you called it. What is different from the situation in September 2003? The
only information I could find so far is that originally, the threshold was
0.25 and I presume that is what Kees' formula is based on.

It would be nice if any changes could lead to different factors in Kees'
formula so we'd get more accurate results for the absolute rating again.

Robert-Jan Veldhuizen

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