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RE: [Bug-gnubg] Luck rates ?


From: Massimiliano Maini
Subject: RE: [Bug-gnubg] Luck rates ?
Date: Tue, 13 Nov 2007 18:51:21 +0100


Hi Ian,
 
> The display occupies four extra lines of text, but they would fit within
> the existing area of the gui. It has the advantage of clearly
> identifying both measurements.
>

> It appears that the EMG luck rate and EMG error rate have not been
> multiplied by 1000 to convert from points to millipoints per move. There
> ought to be consistency here.

I do agree on your second argument, it's a must: millipoints for all the

rates, points for the totals.
About adding lines I'm not sure. Not a big deal however. What about :

                                     yanwolfy             ianshaw
Overall Statistics:
Total Errors in points (EMG)                -7.290 (-8.329)                -3.441 (-3.549)
Error rate in mp/decision (EMG)        -34.5 (-39.0)                -15.9 (-16.0)  
Equiv. Snowie error rate in mp/move        -19.4                                -9.2


Luck Statistics:
Total Luck in points (EMG)                +2.929 (+2.118)                -2.330 (-4.734)
Luck rate in mp/move (EMG)                +15.7  (+11.0)                -12.3 (-25.0)


The only downside of this setup is, to me, that the most meaningful error
values (the total error EMG and error rate EMG) are in brackets. Hence,
if 4 lines are not a big deal, Ian's solution solves the issue.

Side question: is luck rate computed per move (a la snowie) or per decision ?

> I disagree, reluctantly, with MaX's suggestion to use Normalized Equity
> (NE). "Normalized equity", is a great description, but "EMG" is the
> standard term, so gnubg should adopt it for the sake of the users. Don't
> forget that many of them will have more than one bot.

Fine, reluctantly :)
I just found it silly to talk about EMG equity in a money session.
Also, the term by itself (Equivalent to money game) is really a bad
description of what's really going on behind the scene. Since I have
discovered what an EMG is (thanks to this mailing list, btw) I had
to explain it to a large number of players who weren't at all able to
figure out the meaning of EMG. I've even met people saying "EMG in match
play ? I never use them, they are unapplicable in match play cuz is money
stuff".

> Another recent thread raised by Phoivos Mytilinaios raised the thorny
> question of gnubg vs. snowie error rates. I think it's about time we
> revisited this issue, and should consider adopting the snowie
> implementation, again in the interests of commonality for the bg
> community. Even though I have some misgivings about the Snowie way, I
> have to acknowledge that it's the lingua franca of discussions about
> error rates. No one says, "Neil Kazaross played with a gnubg error rate
> of 6.5 in the final". Does showing the gnubg values do anything to
> improve the clarity of the information provided?

I agree that Snowie Error rate is the de facto standard of the bgh world.
But as long as gnubg outputs his own error rate and Snowie's one, then
it's totally fine to me. It's just a line ...

MaX.
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