Not so - it's a little hard to parse out of the prose, but the author does make ...

chias on Feb 10, 2015 | parent | context | favorite | on: Impossible Escape?

Not so - it's a little hard to parse out of the prose, but the author does make an attempt to touch on this in the example of the 2-square chess-board. Anyway, in the full chessboard implementation described here, if the board is already at parity you flip the coin at the top-left.