Beginner Exercise 91 / Solution

Solution  

It is important to atari the stone in the correct direction.

If here, then after , the stone is captured.

Variation  

This is even easier for Black.

Variation  

here is a trick move, but after , White is still dead.

Failure

Failure  

The play from the other direction is a failure. White lives due to double shortage of liberties.

Under the stones - wishful thinking  

Players who know the under the stones technique may be tempted to think of this more convoluted solution. However, this line is wishful thinking and does not quite work.

For details on why this sequence is a failure, please refer to the solution of Under The Stones Problem 6 (though it is not a beginner exercise.)