Opponent’s options: EFTsOON 13c/14h, FESTOON 14i, FOOTy 13b, plays using any opening you create
Scoring options: HYENA 14j (52)
Blocking options: HYENA 13e, YEAH/YANG/YUGA/YUAN/YEAN 13f

In Puzzle 13, you have to block EFTsOON and FEsTOON at on rows 13 and 14 while still finding an out in two that outscores your opponent. The best way to do this is YEAN 13f (20), allowing you to play HUG 14h or VUGH 2f to go out next turn.