Kyu Exercise 91 / Solution

Solution  

Once the reader noticed that starting at a is wrong, here would be fairly obvious. Or perhaps the reader found first.

Solution  

If , then captures a White stone and thus the whole group.

Solution  

If captures the stone, then is an atari, forcing , and destroys the other eye.

Actually, at works too. Then White , and Black a. Just a bit more complicated.

Solution  

here would be similar. transposes the position to one variation of the standard flying saucer shape.

Here, at kills just as well. Then if White at , Black has a choice of a or .

Failure  

As mentioned at the beginning, the hane at is a mistake. With occupying the same point as the first move of the solution, onwards became ineffective. After , the three Black stones is caught in a connect-and-die: if Black a connects, then White b captures everything.

Note that at allows Black to kill by playing at , so is the only move.

Failure  

Blocking at is too weak. lives.