# Under the Stones Problem 6 / Solution

### Solution

The solution is a ko, with White taking the ko first.

Things get easy when descends, all Black has to do is to continue with the original plan.

White lives after , since Black cannot approach at *a*.

### Comment on Beginner Exercise 91

The solution page of Beginner Exercise 91 contained a reference to the solution of this problem.

So, we make the comparison for Beginner Exercise 91:

- The solution of Beginner Exercise 91 is simple and achieves unconditional life.
- Using the under the stones technique only results in a ko for life, as illustrated by the solution to this problem.

Therefore, the solution is superior to using the under the stones technique.