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Manual scoring uses the method of reducing
the top by 1MP for everyone time the board was unplayed -
the concept is that matchpoints are shared with the pair/s
who do not play the board.
Computer scoring uses the Neuberg Formula which factors the
frequencies and assumes that if the boards had been played
more times the scores on the traveller would have been reproduced
proportionately - so if a board is played 10 times instead
of 11 it assumes that a complete top would have been achieved
1 x 11/10 i.e.
1.1 times. It
then matchpoints on this basis.
The traditional manual
adjustment will tend to flatten scores - i.e. my +1100
scores 13MPs instead of the top of 14. In Neuberg it will
13.something. Although there are some
highly complex mathematical arguments about this sort of factoring
it is the generally adopted method throughout international
bridge. You can see the factoring of frequencies
directly on the ECatsBridge pages especially on the higher
numbered boards which tend to be played less times and
so are factored sometimes by 20 or 30 times.
As far as Scorebridge is concerned, if you look at their
webpage you will see that Stephen Bligh advertises Simple
and Neuberg scoring. He explains that if
a club wishes to use Neuberg as ECats does all they need
to do is uncheck the box in the program that says Simple scoring
and then it will factor the frequencies as described.
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