Kyu Exercise 13 / Solution

Order matters.  

The order of the throw-ins and is very important. If Black captures with , White descends with .

Connect-and-die.  

Black has three points to connect: , a, b. But the chain has only two liberties.

Snapback.  

If connects, captures the chain in a snapback.

But this is not yet the solution.

Solution

Solution.  

Now, presenting the actual solution.

Strongest resistance.  

The strongest resistance by Black is , and is the only way to salvage the situation. This is the solution, which is a direct ko. If Black wins this ko, he simply captures at a, and the white chain on the left is captured cleanly.

Local ko threat  

There is a local ko threat at .

Failure

Failure.  

The hane at is a failure. As is a necessary approach move, Black connects at just in time, so there is no connect-and-die.

Failure.  

If in the solution diagram makes a throw-in on the left side first, then can connect. The result is the same as the previous failure diagram.