hoshi911: North-West Problem. Black to kill
Having tried so many sequences, I felt a bit lost, when the
problem was solved after only 3 moves: bS18, wS17, bP19. At first glance,
it was no so clear to me, why the problem stops here. I suggest to
add at least one forcing sequence, how to continue, e.g.
wR19, bQ18, wR18, bT18, wT17, bT15.
Your move has been added.