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[Bug-gnubg] Re: ratings formula, checker play vs. cube
From: |
kvandoel |
Subject: |
[Bug-gnubg] Re: ratings formula, checker play vs. cube |
Date: |
Fri, 12 Sep 2003 04:21:14 +0200 (CEST) |
On Thu, 11 Sep 2003 14:05:06 +0200, Robert-Jan Veldhuizen wrote:
>>No it doesn't, as the cube error is multiplied by an experimentally
>>determined factor which takes this into account.
>>So R = a*player_err + b* cube_err.
>>The effect you are worrying about is taken care of by the factor b which
>>is much smaller than a.
>Since you're using a constant factor b, it is only taken care of in a
>very general way.
>For individual games and matches, where the factor (all unforced cube
>decisions/close or acutal cube decisions) can vary by a huge amount, I
>feel pretty confident it causes a lot of noise and therefore often an
>inaccurate rating estimate, even if it's good on average.
You are assuming cubeErr/totalCubeDecisions is a better measure of cube
skill than cubeErr/totalActualCubeDecisions. I belive the opposite to
hold, so what you are proposing would introduce moe noise.
>It is also inconsistent, because checker play errors DO get divided by
>all unforced moves.
So what? If anything I feel that the checker play total error should
maybe also be divided not just by non-forced moves, but by non-obvious
moves. THis is just harder to quantify.
Kees
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/09
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/09
- RE: [Bug-gnubg] Re: Strange FIBS ratings, Albert Silver, 2003/09/09
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/10
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/10
- [Bug-gnubg] Re: ratings formula, checker play vs. cube,
kvandoel <=
- [Bug-gnubg] Re: ratings formula, checker play vs. cube, kvandoel, 2003/09/12
- [Bug-gnubg] Re: ratings formula, checker play vs. cube, kvandoel, 2003/09/13
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/10
- RE: [Bug-gnubg] Re: Strange FIBS ratings, Albert Silver, 2003/09/10
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/10
- RE: [Bug-gnubg] Re: Strange FIBS ratings, kvandoel, 2003/09/14