Equitable Stroke Control – Why the Change?January 11, 2012
Effective March 1st, 2012, Canadian Golfers will adjust their scores using the same method as adopted by the USGA. Click here to compare the methods. Our offices have been inundated with questions as to why the change?
Matt McKay, Manager of Rules and Handicap with the Golf Canada provided the following:
“I’ve attached two graphs…one mapped using the current ESC, the other with the new ESC. Here is an explanation:
On the x-axis (the horizontal axis), we have the factors calculated without using ESC. Assuming that the handicap factor has merit, the values on the x-axis represent how “good” golfers really are because these values are based on golfers’ actual (gross) scores.
On the y-axis (the vertical axis), we have the factors calculated using the methods of ESC, current and new.
A point on the graph refers to a particular golfer, both his factor with ESC (y) and his factor without ESC (x). We expect points to lie below the line y=x (which is superimposed) because ESC reduces strokes from golfers’ scores.
If all of the points were about the same distance below the line y=x, this would be good because it means that ESC affects all golfers in the same way. However, what is troubling with the former RCGA version of ESC, is that golfers with factors roughly 14-18 fall significantly further below the line. That is, their reported handicap (y) is meaningfully lower than their true ability (x). For example, a 18 handicapper may be actually a weaker player than a 19-handicapper.
To illustrate this further, suppose that an 18-handicapper and a 19-handicapper have identical rounds, a gross score of 93 with three triple-bogeys. The 18-handicapper enters an adjusted score of 90 but the 19-handicapper enters an adjusted score of 93.
The same issue still exists with the new ESC but is mitigated by the fact that the handicap ranges are smaller in the new ESC.”
If you have any questions or comments, you may contact Matt MacKay at firstname.lastname@example.org or 1-800-263-0009 ext. 209.