Beginner Exercise 262 / Solution

Solution  

This is essentially a simple exercise on finding the space to make an eye. After , a and b are miai, and c and d are also miai, so Black lives.

(For advanced readers: The exchange of and is meaningful to erase a pair of mutual ko threats which is far larger for White. This also makes White's ko threat at e smaller. Of course, White may play elsewhere after .)

Comparison  

Immediate also lives, but gives Black two more ko threats to kill ( and ).