Kyu Exercise 43 / Solution

Attack attempt 1  

aims to create a ko. After ...

Attack attempt 1 ( at )  

... if tries to prevent White from living by oshitsubushi, then captures anyway, and then use the throw-in at to capture Black in a connect-and-die.

Attack attempt 2  

and is another interesting attempt, but and lives. Due to shortage of liberties, Black cannot play at a to destroy the eye.

Attack attempt 3  

here is also a good attack, but lives easily.