After move 16.p15 I saw that white can defend with |17.s12 and if white makes no mistakes probably would win the game:
18.t17 White has only one possibility here 19.r15, as we see later.
20.q13 only has one answer too: 21.q12. And now follows the trick:
22.r1823.o18. If not 21 q12 black can play p19 and come up with o12 afterwards.
18.t17 White has only one possibility here 19.r15, as we see later.
20.q13 only has one answer too: 21.q12. And now follows the trick:
22.r18 23.o18. If not 21 q12 black can play p19 and come up with o12 afterwards.