Qoryl: Quote "jingo:
no, not c19 first. b18, a17,c18,(a18( I think he forgot add this move, if not c19 defender's move helps killing his own group)) then c19"
c19 start KO, bad move.
Farkas: That sequence is already covered, and labelled as incorrect.
[Farkas: Your move has been added.] Added also B19, A19, since it's not really a ko; the attacker can always play D19.