Futsal is a sport that relies heavily on tactics. Because the court is so small the defense and offense have to be tactically sound in order to function well. Fustal defenses have to be quick and compact. There are no specific futsal positions. The basic defensive formations for futsal are the 2-2 and 3-1 formations.
The 2-2 formation operates as a simple square. The top two defenders chase the ball and the bottom two support. This formation is effective for pressing and is fairly easy to learn.
The 3-1 formation operates by “sliding” horizontally across the court. The top defender presses the ball while the back three slide to support. If the attacking team past the first defender the central defender challenges the ball. The right and left defenders fall back behind the central and form a triangle.