Indoor soccer or arena soccer is a five-a-side or six-a-side version of minifootball, derived from association football and adapted to be played in walled hardcourt indoor arena. Indoor soccer, as it is most often known in the United States and Canada, was originally developed in these two countries as a way to play soccer during the winter months, when snow would make outdoor play difficult. In those countries, gymnasiums are adapted for indoor soccer play. In other countries the game is played in either indoor or outdoor arenas surrounded by walls, and is referred to by different names.
2013 match between the Dallas Sidekicks and Texas Strikers at Allen Event Center
An indoor soccer arena with boards
Diagram of a possible North American indoor soccer field
Futsal is a football-based game played on a hardcourt like a basketball court, smaller than a football pitch, and mainly indoors. It has similarities to five-a-side football and indoor football.
International futsal match between Argentina and Brazil in 2007
An indoor futsal competition
The Brazil national futsal team line up before a match.
A futsal arena in Tokyo