Rook and knight mate in the corner
A rook delivers check on the h-file with the knight a knight's move away protecting it. The king has no escape: the rook checks, the knight covers the king's flight square and defends the rook. One of the oldest named patterns, dating back centuries to Arabic chess problems.
Rook to the 7th rank with check. Drive the king to the corner.
3 more clean runs (at any point) to reach Recall.
White to move. Two knights and a rook against the wandering king.
3 more clean runs (at any point) to reach Recall.