Magic Contest: Overview Scoring: Neuberg's formula 
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Neuberg's formula is used for scoring a board where rulings, misduplication or some other event have caused a reduced number of results for that board. The rulings are scored according to separate rules that are not affected by Neuberg's formula. When there are played boards with normal results, e.g. +450 or 50, the scoring for those results is based on how many results are compared. At least seven results, at most
three deviant results in one scoring group
Other cases (Neuberg's formula)
Oldstyle scoring means reducing the top by one point per result that can not be compared with. The effect of Neuberg's formula is that the top is not lowered by as much as before. Another effect is that the awarded points become decimal numbers. One decimal is shown but scoring is down to the last decimal. Neuberg's formula looks like this:
The formula is best explained through the example to your right. 
Example
The original 11 results look like this:
Suppose the TD rules one +170 to be changed into A+A+. Then the score table would look like this according to oldstyle scoring:
If you had completely ignored that a result was missing the score table would have looked like this (the value s in the formula corresponds to the score of this score table):
When Neuberg's formula is finally applied this will be the result (the value S in the formula corresponds to the score of this score table):
The score for +450 is achieved this way: S = (11 / 10) * (18 + 1)  1 = 19.9 