Squash is an extremely fast racquet sport held in gyms only.
Two players share a field in which the walls are included. They take turns hitting the ball so returns to the field with the opponent unable to return it. Good concentration and a quick reaction are a key advantage.
Racquets and hitting techniques are similar to tennis, however the running moves are typically significantly shorter and faster.
Up to 250 women and men may participate in the tournament.
Links:
[1] http://www.games-cologne.de/files/Sport/Sportart/Squash/VincentLopez_Squash_31.jpg
[2] http://www.games-cologne.de/files/Sport/Sportart/Squash/VincentLopez_Squash_33.jpg