You're right, it would actually be 89.6. The GHIN system uses .96 of your average differentials to calculate the index. When I said 89.6 I meant half of the best scores averaged that and the other half were the worst of the last 20, i.e. the scores that comprise the anti handicap index. Not sure the phrase "even remotely correct" would be accurate, as I was remotely correct, just not 100%.
4/18/15 at 6:04pm