The Peoria golf system can be used when a player does not have an established handicap or to avoid sandbagging.
The players learn their handicap after the round is completed.
The Committee secretly selects one par-3 hole, one par-5 hole and four par-4 holes from an 18-hole course.
Choose two par-4 holes from the front nine and two par-4 holes from the back nine.

A modified Peoria handicap then is calculated by adding the player's strokes over par on the six selected holes, and multiplying that number by 2.8.
This will be the player's allowance to be deducted from the gross score.
The maximum hole score for allowance purposes is three over par on par-3s and 4s, and four over par on par-5s.

Example:
A player scores 98 for a round.
The player is 11 over par on the six selected holes.
11 x 2.8 = 30.8 = 31 allowance
Net score is 98 - 31 = 67

PS: Try Tee It Forward and The Golf Handicap Estimator.