Four knights are preparing to duel. Each has a different weapon, and will start with it sheathed in his own corner of the square 10 by 10 meter chamber. Each knight moves 5 meters per second.
The Blue Knight has a straight sword that allows him to move twice as fast as the other combatants.
The Red Knight has a curved blade that can hit two knights at a time, provided that they are within 1 meter of each other.
The Black Knight has a wavy-shaped sword that kills anyone that touches its tip.
The Green Knight has a corkscrew-shaped sword that makes himself invisible while it is sheathed.
Who will lose this battle?