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Terminology

Know Your Golf Scoring Terms :

Green in Regulation (GIR) -- "Green in regulation," often abbreviated GIR, is a statistical category on the professional golf tours, as well as a popular method for amateurs and recreational players to rate their rounds. To achieve a green in regulation, your golf ball must be on the putting surface in the expected number of strokes in relation to par. The par for a hole always includes two putts, so to achieve a GIR:

  • On a par-3, you must reach the green with your first shot (on the green in one, two putts for par).
  • On a par-4, you must reach the green in two shots (on the green in two, two putts for par).
  • On a par-5, you must reach the green in three shots.

Sand Save -- The term given when a player lands in a greenside bunker but still saves par by hitting the ball on the green, then making his first putt.

Scramble -- Scrambling is when you do not hit the green in regulation, but you manage to save par or better. Sand Saves as well as up and downs from the rough or off the green are scrambling. The statistic is the ratio of how many pars you save per holes where the green was not reached in regulation. Scrambling is the percentage of not making a green in regulation but still making par. It's mostly recognized as the ability to get up and down (chipping from the rough or fringe and putting for par).

Up and Downs --  "Up and Down" refers to the act of taking just two strokes to get the ball into the hole when your ball is resting off the green or in a greenside bunker. If you accomplish that, then you've achieved an "up and down."  Imagine you've struck your tee shot and also hit the approach to the green, but your approach shot comes up just short of the putting surface. If you make an up-and-down, however, you can still make par. What you need to do is get the ball up onto the green with one stroke, and then down into the cup with another. Up and down.
Technically, you can use "up and down" to describe any two strokes that result in the ball going into the hole. But typically, "up and down" is almost exclusively applied to shots from just off the green and from greenside bunkers, situations where using only two strokes to hole out is the most likely positive outcome.

Handicap Index Formula --

Potential ability is defined by the term Handicap Index and is measured through a calculation using the player's best scores. These best scores are determined by calculating the Handicap Differential for each score. The Handicap Index is calculated by taking 96 percent of the average of the best Handicap Differential(s).

Calculation of Handicap Differentials

A Handicap Differential is computed from four elements: adjusted gross score, Course Rating, Slope Rating, and 113 (the Slope Rating of a course of standard difficulty). To determine the Handicap Differential, subtract the Course Rating from the adjusted gross score; multiply the difference by 113; and divide the resulting number by the Slope Rating. Round the final number to the nearest tenth.

Handicap Differential = (Adjusted Gross Score - Course Rating) x 113 / Slope Rating

Plus Handicap Differential

When the adjusted gross score is higher than the Course Rating, the Handicap Differential is a positive number. The following is an example for determining a Handicap Differential using an adjusted gross score of 95 made on a course with a Course Rating of 71.5 and a Slope Rating of 125:
Adjusted Gross Score - Course Rating: 95 - 71.5 = 23.5
Difference x Standard Slope Rating: 23.5 x 113 = 2655.5
Result / Slope Rating: 2655.5 / 125 = 21.24
Handicap Differential (rounded): 21.2

Minus Handicap Differential

When the adjusted gross score is lower than the Course Rating, the Handicap Differential is a negative number. The following is an example for determining a Handicap Differential using an adjusted gross score of 69 made on a course with a Course Rating of 71.5 and a Slope Rating of 125:
Adjusted Gross Score - Course Rating: 69 - 71.5 = -2.5
Difference x Standard Slope Rating: -2.5 x 113 = -282.5
Result / Slope Rating: -282.5 / 125 = -2.26
Handicap Differential (rounded): -2.3

Handicap Index Formula

The Handicap Index formula is based on the best Handicap Differential(s) in a player's scoring record. If a player's scoring record contains 20 scores, the best 10 Handicap Differentials of the most recent 20 scores are used to calculate the Handicap Index. As the number of scores in the scoring record decreases, the percentage of scores used in a scoring record decreases from the maximum of the best 50 percent. If the scoring record contains 9 or 10 scores, only the best three scores (30 to 33 percent) in the scoring record will be used. Thus, the accuracy of a player's Handicap Index is directly proportional to the number of acceptable scores posted. A Handicap Index must not be issued to a player who has returned fewer than five acceptable scores. The following procedures illustrate how an authorized golf association, golf club, and computation services calculate a player's Handicap Index.

The procedure for calculating a Handicap Index is as follows:

Step 1: Use the table below to determine the number of Handicap Differential(s) to use:

Step 2: Determine Handicap Differential(s);

Step 3: Average the Handicap Differential(s) being used;

Step 4: Multiply the average by .96*;

Step 5: Delete all numbers after the tenths' digit (truncate). Do not round to the nearest tenth.

New New Peoria (NNP) System

Randomly select 12 holes (This will be held after the match and in front of all the players).
Add up gross scores of the selected holes and multiply the sum by a factor of 1.5 to arrive at a NNP adjusted score.
Then, deduct the NNP adjusted score by 72, (the PARs of the course), and multiply the balance by a factor of 0.8. This will be the player’s NNP Handicap.
To get the NNP Net Score, deduct the player’s gross score of the 18 holes by his/her NNP Handicap.
Once the Net Scores of the players are obtained, the one with the lowest Net Score will be the champion.

((12 hole score x 1.5)-72 )*0.8 = handicap