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Subject: Re: what type of result is significant in 100 game match

Author: John Sidles

Date: 13:52:34 02/18/06

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On February 18, 2006 at 03:50:09, Uri Blass wrote:

>My question is based on your experience what is the biggest result that A beat B
>in match of 100 games(Noomen match or match based on other positions like Albert
>Silver's postions) but still A is not better than B against other programs.

Here's a table for how large a plus score you need to see, by either A or B, for
you
to be confident (at the given level of confident) this plus score was not due to
luck.

Here "luck" means that A and B actually each have 1/3 chance of win, lose and
draw,
but that either program was simply lucky enough to achieve a plus score.

nGame = 10, confidence = 95.%, score = +2.5
nGame = 10, confidence = 99.%, score = +3.
nGame = 10, confidence = 99.9%, score = +4.
nGame = 20, confidence = 95.%, score = +3.5
nGame = 20, confidence = 99.%, score = +4.5
nGame = 20, confidence = 99.9%, score = +6.
nGame = 30, confidence = 95.%, score = +4.5
nGame = 30, confidence = 99.%, score = +5.5
nGame = 30, confidence = 99.9%, score = +7.
nGame = 40, confidence = 95.%, score = +5.
nGame = 40, confidence = 99.%, score = +6.5
nGame = 40, confidence = 99.9%, score = +8.5
nGame = 50, confidence = 95.%, score = +5.5
nGame = 50, confidence = 99.%, score = +7.5
nGame = 50, confidence = 99.9%, score = +9.5
nGame = 75, confidence = 95.%, score = +7.
nGame = 75, confidence = 99.%, score = +9.
nGame = 75, confidence = 99.9%, score = +11.5
nGame = 100, confidence = 95.%, score = +8.
nGame = 100, confidence = 99.%, score = +10.5
nGame = 100, confidence = 99.9%, score = +13.5

So for example, in a 10 game tournament, if either
program achieves a +4 score (or higher), you can be
99.9% confident that such a high score was *not*
due to luck.

Note: these were calculated by brute force in
Mathematica.



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