Sumerian, danoschek: "it's chess..." well, no, it's not. it's a variant, which has a different set of rules. it says in the rules the only change is the possibility to extend the board so that it loops on itself. it follows that the only limitation to a rook move is that there be no pieces between the starting and ending point.

Sumerian's infinite regression is no obstacle, since there is the 3 move repetition draw rule.

hmmm... actually that's the way out of this loophole: when the rook starts the move, there IS someone standing on the target square: himself. question is, does this count as an obstacle, since the rook has to move out of it's starting position to reach the obstacle, which is therefore no longer an obstacle? this is starting to enter quantum physics... or in dano's favorite expression, humbug. for once I agree