Know Your INDEX -- And How To Compute It!
1. By Differentials. A handicap differential is the difference betweeen the adjusted gross score and the USGA Course Rating, multiplying the difference by 113, dividing the results figure by the USGA Slope Rating and rounding off to the nearest tenth. The following is an example for a course with a 71.5 Course Rating and a 130 Slope Rating.
 

The value 113 in the above formula is the USGA standard for Slope Ratings and is used to weigh differentials.

2. INDEX Formula. Lowest 10 of Last 20 Differentials. The INDEX is computed from the lowest 10 of the player's last 20 rounds as follows:

If you have fewer than 20 differentials available:

 Equitable Stroke Control
Equitable Stroke Control (ESC) is a procedure whereby abnormally high individual hole scores are adjusted downward prior to the score being posted. ESC sets a maximum number that a golfer can post on any hole, depending on the golfer's Course Handicap (not his Handicap Index). Beginning on April 1, 2000, PGA Vietnam's HDCP computer began to adjust individual hole scores for handicap purposes per the following table:
 

REMEMBER - VGCC Members and Non - Members receive monthly INDEX updates that can be attached to plastic Handicap cards. Members can review their posted scores monthly via Internet: www.pgavietnam.com , or by requesting a copy of their current scoring history from the Golf Operations Office. Peer review is a vital part of the handicap system.
 

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