Antidraughts is a draughts variant where the objective of the game is to run out of legal moves. To win the game you must either lose all your pieces, or have your remaining pieces blocked so that they cannot move.
The rules of antidraughts are the same as international draughts, with the exception that losing means winning. There are also no drawing rules with only a few pieces left on the board. Draws by threefold repetition remain the same (because it is possible to end up in drawn endgame positions), as well as all other rules.