Having an unfavorable two stage ko is better than have an unfavorable approach ko, because if the first ko is won in an approach ko, the player will next have to fight a normal ko, but if the first ko is won in a two stage ko, the player will be fighting a favorable two stage ko.
-- Andre Engels
This is a two stage Ko and kill example.
Two stages gives time for white to break out.
White sucessfully enable herself to live.
iopq: How about this? White is dead. No need to take the ko.