I have a potentially uncommon problem I'm trying to solve.

Overview:
Imagine playing golf with a group of people with recurring tournaments.  There is a scoring system that awards points based on how your score compares to others.
I.E. 1st place awards 100 pts, 2nd 95, 3rd 90, and so on.

Problem:
I have solved for ranking the scores.  my challenge is on how to handle some limitations with players getting the same score and therefore getting the same rank.  (I can deal with this as is) however, for the players that get the same score, I want to calculate how points are distributed amongst them.  

Rules for distribution of points when ties occur:
sum points for ranks 1,2,3... in this case 100+95+90=285, then evenly assign to each tying golfer... in this case that would give golfers 1,2,3 95 points each (285/3)... note that it is also possible for there to be other tying scores down the list (golfers 15 & 30 have a score of 40)

Ranks & Points:
1-100
2-95
3-90
4-85

Example golfer, tourn scores, ranks & points:
golfer 1, score 30, rank 1, points 100
golfer 2, score 30, rank 1, points 100
golfer 3, score 30, rank 1, points 100
golfer 4, score 31, rank 4, points 85

My SQL at this point: (which gives me a "#Error" in datasheet view (Adjustment field). I haven't gotten to the division part yet. Position=Rank

SELECT [MajorScoreOrderingQ P2].[WGT Name], [MajorScoreOrderingQ P2].Position, (DSum("[MajorPosPts]","[MajorPtSystem]","[MajorsPosition]=[" & [Position])) AS Adjustment
FROM MajorPtSystem INNER JOIN [MajorScoreOrderingQ P2] ON MajorPtSystem.MajorsPosition = [MajorScoreOrderingQ P2].Position
GROUP BY [MajorScoreOrderingQ P2].[WGT Name], [MajorScoreOrderingQ P2].Position
ORDER BY [MajorScoreOrderingQ P2].Position;

any assistance is greatly appreciated and hopefully this doesn't constitute writing a book.