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Subject: Re: "Battle of the Crowns" Contest status:

Author: Dan Homan

Date: 05:43:13 07/30/00

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On July 29, 2000 at 19:00:06, Tom Kerrigan wrote:

>On July 28, 2000 at 18:14:13, Dann Corbit wrote:
>
>>On July 28, 2000 at 15:58:53, blass uri wrote:
>>
>>>On July 28, 2000 at 15:33:47, Dann Corbit wrote:
>>><snipped>
>>>>    Program          Elo    +   -   Games   Score   Av.Op.  Draws
>>>>
>>>>  1 LarsenVB       : 2610  186 226    12    79.2 %   2378   25.0 %
>>>>  2 Storm          : 2557  223 166    12    58.3 %   2498   33.3 %
>>>>  3 Noonian        : 2546  232 144    12    54.2 %   2517   41.7 %
>>>>  4 Ozwald         : 2542  166 223    12    41.7 %   2601   33.3 %
>>>>  5 Monik          : 2363  214 247    12    62.5 %   2274    8.3 %
>>>>  6 Zephyr         : 2317  215 215    12    50.0 %   2317   16.7 %
>>>>  7 TSCP           : 2293  180 402    12    83.3 %   2013    0.0 %
>>>>  8 SnailSCP       : 2185  214 194    12    62.5 %   2096   25.0 %
>>>>  9 Raffaela       : 1893  297 170    12     8.3 %   2310   16.7 %
>>>> 10 Golem01        : 1695    0   0    12     0.0 %   2295    0.0 %
>>>
>>>The elo is simply wrong.
>>
>>The ELO is approximate, and correct within the stated error bars.
>
>That means that Golem01's rating is and will always be 1695?

I think the zero error bars just mean that there is no information (no wins
or draws) from which to calculate an error bar.  They should probably be
replaced in the table with "..." to indicate this.

>
>And that TSCP's rating can only get to ~2450, placing it at the middle of the
>pack that it nearly won during the calibration matches?
>

I am not sure how the errors are calculated here, but generally error bars only
specify a probability interval and not the 100% range of variability.  So 70% of
the time the elo may fall within the stated error bars and 95% of the time the
elo may fall within twice the stated error bars, etc... etc....  I am not at all
sure about the 70% and 95% - that was just an example.

 - Dan

>I believe Elo ratings should never be calculated for situations other than
>"normal" tournament play (as with humans).
>
>-Tom



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