A simple introduction
The game is played with four balls, Blue and Black versus Red and Yellow. Unlike Association Croquet, each turn consists of just one shot, and play is strictly in sequence: Blue, then Red, then Black, Yellow and Blue again.
All four balls attempt to get through Hoop 1. As soon as one ball is successful, that side scores a point, and attention passes to the next hoop in the sequence. The first side to seven points is the winner.
Hitting the opponent out of position is legal. Players will often clear an opponent’s ball 30 yards, in the hope of keeping it out of range. Tactical complexity arises out of blocking shots, and putting the other players out of position, while putting your partner into a better scoring opportunity.
There’s more detail available in the Croquet Association website. Click on this link to access the relevant page which has links on it to a Synopsis of the Game and the Full World Croquet Federation Rules of Golf Croquet.