B0sch: The path F2-E1-E3-F3-E4-F1 and then white plays A4 is marked incorrect although it's the correct solution.
See here : https://senseis.xmp.net/?XuanxuanQijingProblem2%2FSolution
posetcay: What you are suggesting is a move for the opponent though (F1 instead of G2). Maybe you made a mistake with your coordinates?
B16 should also work instead of A18. Similar to the problem from Life & Death Advance (Cho Chikun)