Miko_boc:
+ S13 T14 R14 R13 Q14 S12 N16 P14 M17 N18 T15 T13 R19 R18 S18 T18 O19 N19 T17 I find it hard to find a way to prevent this ko if black tries to prevent white from escaping with s13 after s19 from the correct solution

berlou:
d1-b5-a2-b1 is marked as alive, but a6 kills ?

Jr4yA:
a2 first is wrong, answer b2. d1 follow up need to be reviewed as well.

Husrev:
this is also correct.