Opponent’s options: AID b12 (19), ODA m13 (15)
Candidate plays: YEUK 12l (32), KEY 6b (30)
Setup options: Yes
In Puzzle 4, you have a strong setup: TORSI 13k (13). This allows EKY to play at two spots: YEUK at 12l for 55 and KEY 6b for 30. Your opponent will block YEUK with OUD for 13, and that will allow you to play KEY, resulting in a final score of your victory: 413-411.