3.1 COURSE RATING
The Course Rating will replace the current SAGA/WGSA ratings currently used in South Africa.
The Course Rating for each course in South Africa has been determined using qualified individuals who visited each club and used the methodology as required by the USGA CRS manual to rate the courses. During this process the raters collected all the data necessary to be entered into the USGA CRS application hosted in America. The rating data can be divided into two main parameters, namely the Effective Playing Length of a course and the Obstacle Stroke Value of the course. The raters used prescribed forms and the following is a summary of the data elements collected.
Data collected to determine the Effective or True Playing Length of a course.
Golf holes of, say, 400 metres have a different true playing length depending on the following five factors, which are used to determine the Effective Playing Length.
- Change in elevation.
- Doglegs and forced layups.
- Wind. The strength and direction of the prevailing wind. This is a factor mostly applicable to coastal courses.
Data collected to determine the Obstacle Stroke Value of the course.
There are 10 elements that are regarded as obstacles impacting the degree of playing difficulty of a hole. Each of these factors is assigned a weighting from 0 to 10. Zero means the obstacle is non-existent and 10 means that the obstacle is extreme.
The 10 elements impacting obstacle stoke value are as follows:
- Fairway width at landing zones
- Green target
- Recoverability and Rough
Out of Bounds/Extreme Rough
- Water hazards
- Tr e e s
- Green surface
3.2 SLOPE RATING
All the factors that are taken into account for the Course Rating are also taken into account when the Slope Rating is computed. The Slope Rating is a calculation that uses the impact of the Effective Playing Length and the Obstacle Stroke Value for a bogey golfer compared to a scratch golfer, multiplied by a standard factor. Thus the Slope Rating is an indication of the relative difficulty of a course for a bogey golfer when compared to a scratch golfer. The impact of Course Ratings (CR) and Slope Ratings (SR) on the handicap of a golfer
4.1 HANDICAP INDEX (HI)
The HI is a number, to one decimal place, indicating the potential of a golfer. The Handicap Index is the handicap number that will be displayed on the HNA database for all registered golfers in South Africa. It is used in the calculation to determine the Course Handicap the golfer will use for the course they elect to play.
The Handicap Index (HI) is calculated in South Africa as follows:
The last 20 Adjusted Gross scores will be used to determine the handicap Differentials that will be used to calculate the Handicap Index.The best 10 differentials will be averaged and ultiplied by 96%.
Differential = (Adjusted Gross Score – CR) * 113/SR
The Adjusted Gross Score is the number of strokes the golfer played during
their round, adjusted for the maximum strokes allowed on a hole
The golfer played a course with a CR of 72.8 and a SR of 131.
The Adjusted gross score of the round is 89.
The differential calculation for this round is: (89 – 72.8) = 16.2*113/131, which equals 13.9.
This differential, i.e.13.9, replaces the oldest differential and will be used in the calculation of the best 10 differentials from the last 20 multiplied by a factor of 0.96.
A decision was made that there will be NO changes in the current methods we use in South Africa, thus the penalties for late entries of the golfers’ Adjusted Gross score will continue, the impact of exceptional rounds will be the same and the golfers will still receive notifications of exceptional rounds and if a re-calculation of the HI has been done. Also, the daily method of updating the HI will continue. The only difference for the golfer is that they will now have a HI that will be used to calculate their Course Handicap for the course they will play.
4.2 COURSE HANDICAP (CH)
The CH is the handicap the golfer will use to complete their scorecard. All courses (tees) in South Africa are rated for men and only certain tees are rated for women. Women golfers will find that at most Clubs there are two courses (tees) rated for women, namely the Blue Course and Red Course (using the standard colours for South Africa). Courses are no longer gender-based and men can play any course they wish, while women can play those courses rated for them.The Course Rating and Slope Rating for men and women are different, but the calculation of a Course Handicap remains the same.
The calculation of a CH is as follows:
CH = (HI * SR/113) + (CR-Par)
CH is a rounded number and the rounding only happens after the full calculation
is done. A decimal of <0.5 is rounded down and ≥0.5 is rounded up.
Below are two examples for the same golfer with a HI of 12.3
playing two different courses:
Golfer with HI of 12.3 is playing a Par 72 course with a CR of 73.1 and a SR of 144.
Impact of Slope rating: 12.3*144/113 = 15.6
Adjustment to par: (73.1-72) = 1.1
Thus, the CH of the golfer is 15.6 + 1.1 = 16.7 rounded to 17.
The golfer will use the CH of 17 to complete their scorecard.
Golfer with HI of 12.3 is playing a Par 72 course with a CR of 68.3 and a SR of 129.
Impact of Slope rating: 12.3*129/113 = 14.0
Adjustment to par: (68.3 – 72) = -3.7
Thus the CH of the golfer is 14.0 – 3.7 = 10.3 rounded to 10.
The golfer will use the CH of 10 to complete their scorecard.
5. PROCESS FOR GOLFERS TO OBTAIN THEIR COURSE HANDICAP: EASY AND SEAMLESS!
There are a variety of methods available to golfers to obtain their Course Handicaps,
as explained below.
5.1 COURSE HANDICAP CONVERSION TABLES (CHCT)
Every Club in South Africa will display the CHCT at a position easily accessible for golfers. Normally it would be in the Pro Shop or on Noticeboards at the Starting Tees.There is a Conversion Table for each of the colour courses for men and a Conversion table for the rated courses for women. The golfer decides which of the courses (tees) they want to play.
Using the golfer’s HI, look up the CH to use.
Example of CH conversion table:
Course Handicap Conversion Table for Blue Course for Women:
Par 72 Course Rating: 72.1 Slope Rating: 132
| 2.1 to 2.9
|| 17.5 to 18.3
| 3.0 to 3.7
|| 18.4 to 19.1
| 3.8 to 4.6
|| 19.2 to 20.0