It is not entirely clear from your account, George, exactly what happened after the fouling. If it was played once then as Ed says [well, he means to say
] average plus should have been given to both sides. If it is played more than once then it should be scored as two subfields.
Jim has given you the North American regs, which I think are dreadful [not Jim's fault
], and were abandoned many years ago in Europe. They are based on not using computers. Nowadays the norm around the world is to score both subfields using Neuberg's formula, even if the subfield has only two scores.
What is Neuberg's formula? It is what Jim calls the Factored Board formula. But be warned: we do not know where you are but in some parts of the world [eg North America] you get half a matchpoint for each pair you tie with, one matchpoint for each pair you beat. In other parts of the world [eg Great Britain] you get double that. The formula Jim gives is based on North American matchpointing.
In England we use
(M x E) + (E - A)
M=match-points earned by the pair considering only the group itself
E=total number of scores expected on the board
A=actual number scores obtained on the board
This is in fact the same formula - it just looks different!