Najdorf - Sapiro, Lodz, 1929.
This is a lovely game and it's not quite as well know as the others that have been posted.
Black's 9...gxf6 thinking he is going to come screaming down the g-file
is the blunder. Najdorf's play from the diagram is instructive and
easily understood once you see the idea.
(and it's not the mundane Rook lift 18.Re3-g3+ idea (Although I'm thinking
that will most likely win as well OTB).