Opponent’s options: ENROL j11 (9) (out play),
Scoring options: SnIB 14c (28), ISBA l12 (22)
In Puzzle 9, your opponent only has one play: ENROL j11 (9). The best play that blocks this outplay and lets you go out in two is tIBIAS 14d (21), allowing you to go out with FEUS 7c (18).