TsumegoFromGames73/Attempts

white is alive?  

xela: The white stones on the right seem to be alive, with eyes at a and b. Black can try the eye-stealing tesuji of c, but white replies at d and lives.

ko  

xela: The best continuation I can find is and , threatening to capture white's centre group. Then makes ko.

variation: also ko  

If white tries to avoid the ko by playing , then causes a shortage of liberties that makes possible.

(If white plays at , then at , white a, black b.)

LukeNine45: at leaves two ways to make another eye, no?

xela: Um, (looks sheepish), yes.

order is important  

If black tries and in the reverse order, white can defend at then connect with the tesuji at .

variation: Black lives?  

pwaldron: How about this?

a and b are miai for life.