[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: RE: [Bug-gnubg] Removal of absolute fibs ratings
From: |
Massimiliano . Maini |
Subject: |
Re: RE: [Bug-gnubg] Removal of absolute fibs ratings |
Date: |
Mon, 21 Aug 2006 12:11:05 +0200 |
Another funny thing wrt to FIBS ratings : it seems to me that when playing
1-pointers the FBS rating is much more severe (compared to the error rate
based "overall rating") than when playing longer matches.
Example :
1) 1-pointer
Error rate (total) : -0.111
Error rate (per decision) : -5
Equiv. Snowie error rate : -2
Overall rating : World class
Error based abs. FIBS rating : 1890.8
2) 15-point match
Error rate (total) : -0.695
Error rate (per decision) : -5
Equiv. Snowie error rate : -2
Overall rating : World class
Error based abs. FIBS rating : 2004.3
3) 1-pointer
Error rate (total) : -0.256
Error rate (per decision) : -11
Equiv. Snowie error rate : -5
Overall rating : Advanced
Error based abs. FIBS rating : 1668.3
[I've no example of a long match where I played -11/Advanced, but I'm
sure that in a 5pt match, when you get Advanced you normally get a FIBS
rating of 1900 or more].
Maybe there's just a bug in the computations, possibly due to absence
of cube. Another possibility is that Kees' formula somehow incorporates
a correlation between chequer errors and cube errors, which would make
the frmula not adapted to 1-pt matches.
Any thoughts ?
MaX.