Snapback Problem 9

White 2 is a mistake. Punish.  

I hope Dieter doesn't mind if I use his problem (Tsume Go from games 17) full of snapbacks for the Workshop.

Instead of White could try a, however, and after Black's b set up a ko with c. It is an approach ko and therefore difficult for White. White will be eyeless if b is played instead of . Black would play a throw in to make it certain and then will get an eye in the corner.

/Solution