Each player's move is limited by a timekeeper's clock.
How it works
Time per move is about one minute per 30 men plus one minute per gun (e.g. 7 minutes for 110 men and 3 guns), reduced as the battle progresses. The mover waits a yard behind his back line until 'Go' and must stop instantly at 'Time', with warnings at two minutes, one minute and thirty seconds. An interval of four or five minutes follows for tidying and consideration.
He then proceeds to make his move until time is up. He must instantly stop at the cry of "Time."