After 11 (138) 35 black can not play (42 A) (10) (36) and 27, 33, 43 is good for a win. But the answer A: (33) is good.
After 11 (138) whites best plan must be 24, 24. Black has the problem that after (28) 6 (32) 1 it’s not possible to do (317?) 19, 41, 13.
SO; has he a defense after 24, 24 ?