### Calculating Handicaps

Only Open Play scores are used to calculate handicaps. Before scores are posted for handicaps, the Handicap and Chip-in Pot Committee adjusts scores on scorecards using the USGA Equitable Stroke Control (ESC) procedure, which minimizes the possibility of distorting a handicap. The following 9-hole modified ESC adjustment is used:

Course | Maximum |

Handicap | Hole Score |

4 or less | Double Bogey |

5 - 9 | 7 |

10 - 14 | 8 |

15 or more | 9 |

To help with pace of play, the following grey tee markers were moved forward near the cedar tee markers:

Holes #1, #4 and #7 Tournament |

Holes #1, #2 and #7 Baer |

Hole #9 Players |

Handicap Index calculations are based on Handicap Differentials derived from the member’s Adjusted Gross Score and the USGA Course Ratings and Slope Ratings for Schaumburg Golf Club courses listed below:

** 9-Hole Course Rating/Slope **

Tee | Tournament | Baer | Players |

Red | 32.7/115 | 32.4/112 | 32.2/117 |

Green | 34.0/124 | 33.6/114 | 33.1/114 |

Updated: March 2018 |

The number of best (lowest) Handicap Differentials to be used to calculate a Handicap Index is determined from the following table:

Posted | Differentials |

Scores | To Be Used |

3 - 6 | 1 |

7 - 8 | 2 |

9 - 10 | 3 |

11 - 12 | 4 |

13 - 14 | 5 |

15 - 16 | 6 |

17 | 7 |

18 | 8 |

19 | 9 |

20 | 10 |

An example Handicap Index calculation is as follows.

A man's Adjusted Gross Scores for 9-hole rounds from the grey tees were:

51T, 51B, 47T, 55T, 45P, 48T, 50T, 49P, 48B, 52P and 49T

The letters after the scores are for the Baer, Tournament and Players courses.

A Handicap Differential is the difference between a player's Adjusted Gross Score and the Course Rating of the course on which the score was made, multiplied by 113 (USGA standard difficulty Slope Rating), then divided by the Slope Rating from the tees played and rounded to the nearest tenth. Below are the calculated Handicap Differentials for the above Adjusted Gross Scores:
(51T - 32.7) x 113 / 115 = 17.9817 = 18.0

(51B - 32.4) x 113 / 112 = 18.7661 = 18.8

(47T - 32.7) x 113 / 115 = 14.0513 = 14.1

(55T - 32.7) x 113 / 115 = 21.9122 = 21.9

(45P - 32.2) x 113 / 117 = 12.3624 = 12.4

(48T - 32.7) x 113 / 115 = 15.0339 = 15.0

(50T - 32.7) x 113 / 115 = 16.9991 = 17.0

(49P - 32.9) x 113 / 117 = 15.5496 = 15.5

(48B - 32.4) x 113 / 112 = 15.7393 = 15.7

(52P - 32.2) x 113 / 117 = 19.1231 = 19.1

(49T - 32.7) x 113 / 115 = 16.0165 = 16.0

(14.1 + 12.4 + 15.0 + 15.5) / 4 = 14.25 x .96 = 13.68 = 13.6

The Course Handicap is used in Special Events. A member's Course Handicap is determined by multiplying their Handicap Index by the Slope Rating of the course to be played and then dividing by 113. The results are rounded the nearest whole number (.5 or more is rounded upward). The Course Handicap for the Tournament course would be:(13.6 x 115) / 113 = 13.840708 = 14

Members' Handicap Indexes and Adjusted Gross Score averages for the last 20 rounds can be found on the Handicaps webpage. Members' Adjusted Gross Scores, Handicap Differentials and 4-week Handicap Differential averages for 40 rounds can be found on the Member Statistics webpage. The 4-week Handicap Differential average can be viewed as a Handicap Differential trend because it includes all differentials not just the best which are used to calculate Handicap Indexes.