King and queen working together to trap the lone king
Queen a knight's-move from the king, your king supports, walk the lone king to the edge. Mate. Dodge the stalemate.
Queen checks. Force the king to the back rank.
3 more clean runs (at any point) to reach Recall.
Lone king in the middle. Drive it to the edge with the queen.
3 more clean runs (at any point) to reach Recall.