Article in English: Indoor and outdoor soccer varies in some crucial ways (mostly due to the smaller size of the field for indoor soccer), including the different positions players can be in. With indoor soccer, there are only 6 players, including the goalkeeper, on each team. The players that would normally be considered defense or forward have more flexibility in their roles and can play both offensive and defensive roles. Basically, all players (including the goalie) have more freedom to move around in the arena and are less bound to one specific function in the game. Because indoor soccer is played in a smaller, enclosed area, there are certain rules that differ from outdoor soccer. Many of these rules are similar to other arena sports.  Players can be substituted at any point during the game. For example, with indoor soccer the game continues without any penalties or stoppage if the ball hits the walls enclosing the field. The game simply continues with each player rushing to take possession of the ball. This practice is known as  “play off the walls.”  Only if the ball goes over the walls and out of the field entirely is there a stoppage and the team that didn’t strike out the ball is allowed to throw or punt it back in (as in outdoor soccer). However, some indoor arenas have walls that completely enclose the area, in which case it is impossible for the ball to go out of bounds. Though there are many differences between indoor and outdoor soccer, the overall objective and methods of playing are more similar than they are different. Therefore, knowing the similarities will help you pick up the mechanics of indoor soccer more quickly.  For example, standard rules of no contact apply in indoor soccer. You cannot hit, intentionally kick, or otherwise physically obstruct another player during the game. The method of scoring a goal is also the same. To score a goal, a player must kick the ball into the opposing team’s goal box, passing over the goal line, between the posts, and under the crossbar. If the referee calls a foul for...

Summary in Indonesian:
Ketahui perbedaan posisi pemain. Pelajari peraturan khusus dalam sepak bola dalam ruangan. Ketahui peraturan yang sama dengan sepak bola biasa. Tentukan lama pertandingan.