Kiattiyos Laohasurayotin:
B’s last move at T17 instead of T19 lives unconditionally.

Lyde:
Hmmm, I don't quite see how T19 lives because the squeeze doesn't work due to a shortage of liberties... But I do see now that it becomes a step-KO instead of the Q19 direct KO.

Lyde:
Shouldn't the T18 variation (top right) end with Q19 for the defender instead of T19? Either way the last move for the attacker is missing