[blml] 60% session in IMPs

[Alain Gottcheiner]

Konrad Ciborowski a écrit :
> Hi,
>
> It's me again.
>
> L12C2c
>
> "The foregoing is modified for a non-offending contestant that
> obtains a session score exceeding 60% of the available matchpoints or
> for an offending contestant that obtains a session score that is less
> than 40% of the available matchpoints (or the equivalent in imps).
> Such contestants are awarded the percentage obtained (or the 
> equivalent in imps) on the other boards of that session."
>
> What is the equivalent in imps of a 60% session?
>
> In an IMP session of 20 deals (Butler scoring)
> the highest possible score is 24 IMPs x 20 = 480 IMPs. 
> 60% of that is +288 IMPs a score almost unheard of.
>
>   
Not the right way to compute that. 50% is the equivalent of 0 IMPs, not 240.

>     Does this mean that we award +3 as average plus in a 20 deal
> IMP session unless the contestant's score is +288 IMPs
> in which case we award him another 288 IMPs as average plus 
> (his session score) making his score +578 IMPs?
>   
Since 60% is equalled to +3 IMPs, I'd say 60% on a 20-board match is +60 
IMPs, and 40% is -60 IMPs.


Best regards

    Alain