Re: [Bug-gnubg] Rating and grading

[Rod Roark]

Hi all, I've been away from this list for a while.  Just
thought I'd post an update on ParlorBot's stats, after about
5 months in service running 0.13.0:

Number of samples  : 15992
Lowest             : 1856.69
Highest            : 2154.10
Mean               : 2005.42
Standard Deviation :   52.34

Again this is 2-ply play and cube decisions, "narrow" move
filters, 33% reduced.

Cheers,

-- Rod

On Monday 07 July 2003 12:00 pm, Rod Roark wrote:
> On Monday 07 July 2003 10:40 am, Albert Silver wrote:
> > ... GNU's attributed rating is supposedly based on the FIBS rating system
> > and is designed to give a rating that approximates what a user might get
> > at FIBS. However, it's self-attributed rating seems to be what
> > everything else is relative to and is at 2200. GNU does not have a 2200
> > rating at FIBS, not even by a margin. I think that lowering this to
> > 2050, representing it's average, would make much more sense. As a
> > consequence, all its relative ratings should be lowered accordingly.
> 
> Here are the latest cumulative stats for ParlorBot, which
> runs gnubg on FIBS with 2-ply checker play and cube
> decisions, 33% reduced:
> 
> Number of samples  : 3692   (i.e. number of rated matches played)
> Lowest             : 1880.71
> Highest            : 2120.74
> Mean               : 2002.35
> Standard Deviation :   51.70
> 
> While the average rating used to be around 2030, there has
> been a great deal of wandering from that.  Also I suspect
> that a few clever FIBSters have learned to take advantage of
> the bot's less-than-perfect evaluation in back games and
> holding games.
> 
> -- Rod