The rules
Irish Rumble is played by every group in the field at once. Each golfer plays his own ball. On each hole, the group’s best net scores are added up, and how many of them count depends on the hole.
The four variants
Better Ball, where the same number counts on every hole, is its own game with its own guide.
Handicap and the cap
When Irish Rumble is the main game, the allowance is 85% of each golfer’s course handicap. When it runs as a side game, it uses the tournament’s own allowance.
The net double bogey cap is always on. Every score is capped at net double bogey before the best nets are picked, so one disaster can’t sink a hole where all four count.
Ties on a hole
When golfers tie for a counting place, it makes no difference which of them counts, because the score is the same. If two count and three golfers are tied on 5 behind a 4, the hole is 4 + 5, and the 5 counts once.
Groups of three
If some groups have four and others three, each threesome plays with a borrowed 4th. On every hole, the fourth score is taken from a golfer in another group, in a fixed rotation through the field, at his own net.
Nobody is told their score is being borrowed, and the threesome doesn’t pick who. If the donor hasn’t posted yet, the group shows a provisional total on three balls until he does. It helps to send threesomes out last. If every group is a three, nobody borrows anything.
The money
Every golfer pays the same entry into one pool for the field. The place pays the whole group, and the prize splits among its real golfers: four ways in a foursome, three ways in a threesome. The borrowed 4th is not paid.
Tied groups split the places they cover. There is no countback.
Irish Rumble starts again every round. A two-day tournament plays it twice, with a new entry, a new pool and a new winner each day.
Scoring it without a spreadsheet
Picking the best one, two or three nets on every hole for every group in the field, after strokes and the cap, is slow on paper and easy to get wrong. Halved does it from the scores each group already posts.
Every group, every counting ball.
Free for the field. Post your own scores and Halved picks the counting nets, fills in the borrowed 4th and pays the winning group.