Choose all targets within your sight. Each target must make a DC 18 Wisdom saving throw or be suffering the effects of this spell. Creatures that succeed are immune to the spell for 24 hours. Creatures affected by it are trapped in an illusionary chess game. Each of them must follow these rules. Each creature affected can only move 10ft diagonally, and moving uses their action. They can only attack if the target is directly diagonal  and within 10 ft. If the affected creature successfully kills a target, the target is knocked out of the illusion. Any target knocked out of the illusion is unconscious, even if they were killed in the illusion.