Endgame Is Everything

A little puzzle for everybody.  This is basic endgame theory that I would have expected everybody to know (or at least be able to figure out on increment).  

In the real game, an FM messed this up and gave up a draw to an opponent 300 points weaker.  That's one way to screw up a tournament.

I hope this inspires somebody to up their endgame studies.. especially if you're 1800+ and don't know how to win this instantly.