RTG Problem 28 / Solution

Solution.  

The 1-2 point is the key in the solution.

Solution (variation).  

If here, then Black can play and and capture White due to shortage of liberties.

No ko.  

attempts to set up a ko fight. However, connects to the stone and there is no ko.

Reference.  

and lives too, but loses one extra stone.

Failure.  

and is greedy. After makes the large monkey jump, Black dies of a straight three dead shape.

Failure.  

here cannot live. simply plays a honte, and Black is a L-group dead shape.

Original problem

Dead I.  

Because Black lack outside liberties, is possible. If blocks, then onwards cause Black to be trapped in a double damezumari.

Dead II.  

If first, then the clamp at is tesuji which kills.