I dreamed a few weeks back of a brutally savage football and chess cross-variant, involving playing barefoot inside an octagonal shaped building and the floor was covered with broken glass and nails. There was a circular pillar in the centre of the room. Players took it in turns to strike the ball at an opposing player, using the angles of the wall and the central pillar to rebound and hit the other players who must dodge the ball or get "out". The aim was obviously to stay still if possible and not rip your feet to shreds.
A team of judges scored players by accuracy, tactical skill and showmanship.
I vividly remember playing this game.
The audience were watching down on us from above (like a Roman Colosseum) and it was all very tense.