posetcay: L13 leads to the same result as G10 since sente has no value. This could be fixed with adding a move worth 1 point gote, which would lead to G10 being the only correct move.
richyfourtytwo: You are right, I changed the problem following your suggestion.
L13 leads to the same result as G10 since sente has no value. This could be fixed with adding a move worth 1 point gote, which would lead to G10 being the only correct move.