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. _______________________________________________ Bug-gnubg mailing list [email protected] http://lists.gnu.org/mailman/listinfo/bug-gnubg
