This one was a little trickier. So black replays 11 at 5 after white a and white must play 12 at b to avoid losing the larger group in the snapback. White cannot answer 5 with 7 earlier because then black plays 7 at 6 and white's 8 is self-atari. 9 instead of 8 for white there is still a snapback.
unkx80: Wrong order of moves...
If white plays 2 at 3 then: