Kyu Exercise 47 / Solution

Solution ( at )  

makes an eye, and then the throw-in at is important for reducing Black's liberties by one. After , White wins the capturing race. (Neither side can play at a, but White can approach from b.)

Failure 1  

forgot to make the required throw-in, connects and Black wins the capturing race.

Failure 2 ( at , at marked stone)  

here doesn't form a bigger eye. Black wins the capturing race by one move.