Tsumego From Games 23 / Attempts

Solution  

If White plays 2 at a, Black simply connects at 3.

Variation (5 at 2)  

The throw-in at 2 here is fruitless for White.

I think this works as well, but I'm not sure:

Solution  

Black 1 creates a bent four eyespace. It seems to me that this doesn't lead to a ko as in Bent Four in the Corner is Dead, because neither of the central points of the bent four are in the corner.