Four square is a team sport played among two teams with two players each on a square court divided into four quadrants: A, B, C, and D (usually numbers 3, 4, 2, and 1, respectively, depending on the court.) The square that a player gets to before anyone else immediately becomes their position in the game. The objective of four square is to eliminate players on the opposing team to achieve the highest rank on the court, and this is done by bouncing the ball back and forth between quadrants. A player on one team may bounce the ball to an opponent team's player's square, and tries to bounce the ball in a state that the player on the opposing team can not hit it to another square. The winning team will move up in the ranks, and the team that reaches the highest rank, A (usually number 3 on numbered courts depending on the court), first, wins, with all the losing team's players being eliminated. A player is eliminated when a ball is bounced in a player's quadrant and the player is unable to bounce the ball into another player's quadrant. It is a popular game at elementary schools with little required equipment, almost no setup, and short rounds of play that can be ended at any time. Playing environment Four square is played on any hard-surfaced court, such as wood, concrete or asphalt. There is no official court size, but typically courts measure between on a side, and divided into four smaller equal-size squares. Each of the four squares has a rank and is occupied by a single player. The ranks may be arranged so that either the highest ranking square is positioned facing the lowest ranking square, or the ranks increase as one moves clockwise (or counterclockwise). The lines on the court are boundaries. The interior lines separating player squares are out of bounds. The ball may not touch any portion of an inside line or the player who hit the ball is in error. The lines marking the outermost edges of the court are typically considered in-bounds. These boundary rules are often described as "inside out, outside in." In recreational play, and even with a judge in tournament play, it is often difficult to determine if the ball hits the line. Ball usage Four square is played with a rubber playground ball, typically diameter, and inflated