Lure a piece onto a bad square
Deflection in reverse: a sacrifice forces a piece onto a square where a second attack lands.
Rook sacrifice with check. King MUST take.
Go on then, take it.
3 more clean runs (at any point) to reach Recall.
Rook on f8 and king on g8. We need the king on f8 for Queen to f7 (Qf7) mate.
3 more clean runs (at any point) to reach Recall.