Oh, John   #4735
No. Date Tournament – Course Division Gross Adjusted Rating Slope Diff. Top
The USGA procedure for calculating a Handicap Index is described at:
http://www.usga.org/Handicapping/handicap-manual.html#!rule-14389
NIMAGA Tournament Handicap Index uses top 3 of last 6 differentials;
(or top 2 if only 4 differentials or top 1 if only 2 differentials).