Noel Herradura: Okay, here Black has one guaranteed eye. Now how to make the second one...
Noel Herradura: My first instinct is to connect the two black groups, of course. But then White would connect to her upper stones and Black would be dead. Am I right?
Noel Herradura: So the first priority is to prevent White from connecting. White then ataris with 2, Black extends with 3. White then plays 4 to attempt to separate Black.
But after Black plays 5, white should play elsewhere since Black has secured three eyes.
Hey hey... how was that? Did I miss any variations?
Noel Herradura: D'oh! I forgot this variation! What if White ataris with 2 instead? Black cannot connect his ataried stone because White would connect with the two marked stones...
Noel Herradura: Continuing the variation which leads us to the next diagram...
Noel Herradura: Now it is in both players' interests to play bigger moves elsewhere. White has a ko threat at a that she can use later.