720
and the rule explicated so:
(i.imgur.com)
Be sure to follow the rule before you head out.
Rule: You must post before you leave.
A sorcerer has claimed to create a chariot that can guide itself through the labyrinth unaided by human hand, but there have been a number of deaths associated with this supposed self-driving chariot, and the common folk are beginning to suspect that this supposed sorcerer is nothing more than a common mountebank.