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From: | Robert-Jan Veldhuizen |
Subject: | [Bug-gnubg] Re: ratings formula, checker play vs. cube |
Date: | Sat, 13 Sep 2003 18:47:05 +0200 |
At 12:01 9/13/2003 -0400, you wrote:
I think you are still missing the point that the contributions of checker play errors and cube play errors are converted to equivalent rating loss INDEPENDENTLY.
No, you miss my point. The above is obvious. Let me repeat. The problem is, cube errors are input into your formula AFTER being divided by what GNUBG considers "actual or close decisions". As I explained, that is often no good for match play and as such this gives inaccurate ratings. Read my other posts to see why.
Dividing the total cube error by all cube decisions gives a better estimate of someone's cube skill. Try it if you don't believe me, I'd say. I've analysed about 400 matches and I'd say GNUBG's current method is worse than the old method of counting all cube decisions.
Also see my examples about closed-out situations and 2-away both to see why the current method is inaccurate for match play.
-- Robert-Jan Veldhuizen
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