[blml] Thai braking

Steve Willner willner at cfa.harvard.edu
Sun Apr 1 19:20:10 CEST 2007


> An problem with the standard WBF Victory Point
> scale is ... the
> majority of imps scored are worth nothing, but
> a minority of particular imps are worth a full
> victory point.
...
> Another problem with the standard WBF Victory
> Point is that the scale is too compressed.

I think you mean "too nearly linear."  The WBF scale is much closer to 
linear than logarithmic, and log is probably not the right functional 
form anyway.

For alternatives, you might want to look at the "Bethe" VP scales, which 
have the merit of a clear mathematical justification.  I believe the EBU 
scales are similar but not identical to Bethe.

Bethe scales for 3-10 boards are in Appendix V of
http://usbf.org/docs/COC/usbc2003final.pdf
I'm fairly sure the underlying derivation was posted here on BLML, no 
doubt before 2003.



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