Black's cluster looks ready for a big move at (7,7) — but that point is a compound foul: a gap four and a straight four through one stone. The skill is not to abandon the attack but to re-route it: a legal point nearby keeps the stones working together, keeps white's answers coming, and preserves the threat for a move when the forbidden squares no longer matter. In renju, black's strongest-looking point is often a landmine; the map of your own fouls is part of the position.
Solve the remaining tasks to finish this lesson.