5.1b For a 9-hole Score

A 9-hole Score Differential is calculated as follows:

9-hole Score
Differential		 = (113 ÷
9-hole Slope Rating) 		x (9-hole adjusted gross score –
9-hole Course Rating – (0.5 x PCC adjustment))

An 18-hole Score Differential is created by combining the 9-hole Score Differential for the 9 holes played with the player’s expected score over 9 holes.

The 9-hole Score Differential remains unrounded until after it has been combined with the player’s expected score. The 18-hole Score Differential is then rounded to the nearest tenth, with .5 rounded upwards.

If fewer than 9 holes have been played, the score is not acceptable for handicap purposes.

For a 9-hole score to be acceptable for handicap purposes over a course which consists of fewer than 9 holes, a Course Rating and Slope Rating must be issued over 9 designated holes. The calculation of a 9-hole Score Differential is carried out using the normal procedures as set out within the Rules of Handicapping.