soccer can be played in both: outdoor and indoor
indoor soccer is played with walls,and there is no out of bounds unless the ball goes over the wall. the grass is turf in indoor soccer.there is no slide tackling in indoor.
There are actually several places for kids in the Chicago area to play indoor soccer. Three examples of facilities that offer youth soccer leagues are Chicago Indoor Sports, Chicago Youth Soccer, and Chicagoland Indoor Soccer.
Continental Indoor Soccer League ended in 1997.
Continental Indoor Soccer League was created in 1993.
World Indoor Soccer League ended in 2001.
World Indoor Soccer League was created in 1998.
American Indoor Soccer League was created in 2002.
Eastern Indoor Soccer League was created in 1997.
Futsal is just a training league and indoor soccer is anywhere playing soccer inside.