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A tournament chooses how tightly the hoops are set, and it changes the whole game. WCF Sports Regulation 8.1.2 defines the clearance as the gap between the ball and the uprights and requires it to be “as near as possible equal to, but not less than, 0.8 mm”, reducible to 0.4 mm in easy conditions and raisable to 1.6 mm for difficult Golf Croquet blocks. Law 5.2.1.3’s own outer limit is a 4 inch hoop, which with a 3⅝ inch ball is 9.5 mm.
The opponent’s accuracy is David Appleton’s published model: one number, the chance of hitting a single ball at 13 yards, fixes the chance at every other distance. Changing the clearance starts a fresh game.
Each side plays two balls — blue and black against red and yellow — and must make each of them run the twelve hoop points and then hit the peg: 26 points a side (Law 1.1). You play blue and black. The sides play alternate turns; at the start of a turn you may play either of your balls (Law 12.1).
A turn is one stroke unless you earn more. Hit a live ball and you have made a roquet (Law 17.1): pick your ball up, place it touching the ball you hit, and play a croquet stroke that must move both (Laws 18.3 and 18.5). After the croquet stroke you get one continuation stroke (Law 19.1). Run your hoop in order and you get a continuation too, and every ball becomes live again, so you may roquet them all a second time (Laws 9.5.3 and 2.6.10). Play a stroke that neither roquets nor scores, and the turn ends (Law 7.6.1).
Click where the croqueted ball should finish, then where your own ball should finish. The panel then tells you the split angle and the distance ratio those two destinations demand, and whether one stroke can deliver them. It usually cannot: the reachable band runs from a stop shot, which sends the other ball about 5.64 times as far as yours, to a pass roll, which sends it 0.94 times as far. Those two figures, and the drive at 4.12 and the full roll at 1.24, are Don Gugan’s measurements of real strokes, and this game is calibrated to them rather than to a guess.
A ball is 92 mm across (Law 5.3.1) and a championship hoop is set so that it passes with 0.8 mm to spare in total (WCF Sports Regulation 8.1.2). That fixes the largest angle at which a ball can run the hoop without touching, exactly:
θmax = arccos( ρ / (ρ + s) ), ρ = R + r, s = c/2 − |d|
with R the ball’s radius, r the upright’s, c the clearance and d how far off the centre line the ball crosses. Dead centre at the championship setting that is 6.96°; at a 3¾ inch club hoop it is 13.73°. The Running panel computes it live from wherever your ball lies.
space play the stroke · V swap the plan and playing views · ←→ aim, with shift for fine aim · ↑↓ strength · esc close this.
An independent reimplementation of Association Croquet, the codified game whose Laws of Association Croquet, 7th Edition were approved by the World Croquet Federation Council on 24 January 2021 and are adopted by Croquet England (formerly the Croquet Association) and the other national bodies. It is not published by, endorsed by or affiliated with the WCF. Croquet itself is far older and has no author; the modern game was codified in England in the 1860s and the WCF has governed its Laws since 1989. Full attribution, every Law cited, and everything this game reconstructed rather than sourced, are in CREDITS.txt.
Differences from the Laws, stated plainly: this is level singles only, so Laws 42–50 (bisques and doubles) are not implemented; the errors and interferences of Laws 23–38 are not implemented because there is no opponent to forestall, except the one fault the croquet stroke turns on (Law 29.1.13, failing to move the croqueted ball); the advanced-play lifts of Law 39 are shown but the wiring lift of Law 16 is offered rather than compelled; and no ball ever leaves the ground, so jump shots are absent.