Rules of Polo
The Team
There are four members per team, each assigned a number 1 through 4 with specific duties as follows:
No. 1 man should stay out front. His duties are to score goals or turn wide passes back to the goal mouth where a team mate may score.
No. 2 man should be within range of No. 3 man’s shots to pass the ball to No. 1 man, then cover him or shoot for the goal if a set up is made.
No. 3 man should be the field captain and the strongest team member. Primarily a defensive player, he should be able to quickly change places with No. 4 man to defend the goal and be equally able to go ahead of his No. 2 man to carry an offensive drive up the field.
No. 4 man should have great power on his back shots, as his play is defensive and heads off plays toward his own goal.

Rules of Polo