Q: In Martian Chess, what happens if players keep moving a potential last piece back and forth over the border so that the end condition cannot be reached?

A: Ending a Deadlock: During the final stages of the game, the action slows down and may become stagnated. If any player feels the game has reached a state of deadlock, during their turn they may “call the clock.” From that point on, if seven moves go by in which neither player captures a piece, the game ends and the final score is computed. If someone makes a capture, the counter is reset.

Resolving a Tie: If the final score is tied, and one Zone is empty, the player who ended the game is the winner. But if the game ends in a deadlock with a tie, the result is simply a tie. Play again!

This has been added to the rules in the stand-alone small box set, but previous iterations of the rules did not include this info.