RTG Problem 16 / Solution

Solution  

Black must cut at . After , starts the two stone edge squeeze tesuji.

Solution (3 at circled stone, 4 at squared stone, 6 at circled stone)  

After , Black wins the capturing race by one move.

Solution  

Since the given sequence is a joseki, there is of course no problem with and .

Solution (5 at circled stone, 6 at 1, 8 at circled stone)  

Because even when Black applies the two stone edge squeeze, White still wins the capturing race by one move.

Solution  

The solution is to crawl one more time at , before jumping out at . And this is joseki.

Failure  

The reason is because if jumps out too early, then is a tesuji that makes a and b miai.

Failure  

If defends on the upper side, then and captures the two White stones.

Failure  

If saves the two stones, then onwards can capture the corner.

Failure (8 at 2, 9 at 4)  

The two stone edge squeeze comes into play again.