Beginner Exercise 25 / Solution

Ah! My eye! I can't see!  

hits the vital point and kills the group by making miai of the kill at a or b.

Variation 1  

If , prevents a second eye. If captures....

continued  

throw-in still holds White to one eye.

It would do White no good to capture , even as a ko threat, because the resulting eye would be a false eye.

Variation 2  

And if White blocks the other direction, she still dies after . It's a bent four - but with the two inside points occupied.

Variation 3  

Against here, or a kills similarly as above diagrams. ( at b also kills, which better protects the outside.)

reason ( elsewhere)  

Black needs to respond to , because after , Black can't play at a to falsify the eye.