Beginner Exercise 147 / Solution

Is this five bulky or what?  

For any other white response, just play at .

Alternative  

Charles This also works. Note that at allows a ko. And that the result after is not seki.

Alternative  

Anonymous: This should work too. If at , then at .

Variation  

Or like this, if white tries a different defense.

Yet another solution  

Tapir: While there are many solutions, some leave White with less liberties. Best to show those first out of principle.