Each player has two coloured balls, black and blue versus red and yellow.

The aim is to make each of your balls pass through each of the hoops in order and then hit the peg in the centre of the lawn, 26 points in total.

Clips which match the colours of the balls are used to indicate the next hoop to be "made" by each ball. The game starts by each ball being played from either of the baulk lines.

When it is your turn, you may play either of your two balls, however you cannot swap and use the other ball during that particular turn.

If you can make your ball hit (roquet) any of the other three balls, you earn yourself two further shots. For the first of these extra shots, your ball is picked up and placed against the ball which it hit. It is this two ball shot which gives the game its name. In the two ball (croquet) shot, both balls must remain inside the boundary, otherwise your turn ends and all further shots are forfeited.

With any other shot, a ball which crosses the boundary is 'measured' (yarded) back onto the lawn and the turn continues.

You also earn one extra shot when your ball goes through its correct hoop and you can then use all the balls again. In this way it is possible to make a break running a number of hoops in a single turn. Because your opponent can gain extra shots by making his or her ball hit yours, it is important that at the end of your turn you leave your balls where the opponent cannot easily use them.