Improve Your Chess: First Learn End! - Fischer-Bisguier 1959

The young Fischer uncharacteristically forces the trade of queens in the opening. It then becomes a fairly even game all the way into an equal rook and pawn endgame.  Bisguier then strangely offers the trade of rooks into a drawn, but dangerously tricky king and pawn endgame where Black has to tread a fine line to draw.  Bisguier does just that - for a while - but finally makes that "easy" fatal mistake and Fischer displays excellent technique (he was only 16 after all) to put the older GM away.