The server stands behind the diagonal line, bounces the ball to self and must hit the ball after the first bounce with two hands, little fingers touching, and underside of the ball. The ball must be served from behind the diagonal line and the server must remain behind the serving line until the ball has bounced in another box. The best-placed balls are the ones that cannot be returned. Place the ball in a corner far from the player. Balls that bounce deep in the corners are very hard to be returned.
Some players play too far forward, place the ball near the outside line.
Some play back, place the ball near the inside line. Each player should send the ball to a player in a higher number box and all players should try to get the server out. Player 2 tries to get out 3 and server. This is the basic four square rule. The ball must be hit into another box and the player must play the ball after one bounce and hit with one tap into another box.