'My 60 Memorable Games' by Bobby Fischer [Game #3 vs Petrosian]

The following is an excerpt from Bobby Fischer's book 'My 60 Memorable Games'. I  have included the introduction to this chapter by Larry Evans as written in the book, and the notation by Bobby Fischer will appear as you move forward through the moves of the game.

Game 3 - Petrosian vs Fischer

Bear hug.

In what appears to be perfectly equal positions, Petrosian consistently finds  seemingly innocuous moves that gradually overwhelm his opponent. He  accomplishes his objective simply by exchanging pieces and manoeuvring for victory without taking unnecessary risks. This essentially defensive technique has the virtue, when it doesn't utterly succeed, of producing a draw. Fischer, by contrast, generally chooses the sharpest course, however precipitous it may become. Occasionally he over-reaches himself, but it makes for interesting chess. In this game, replete with errors on both sides, Petrosian succeeds in pinning his opponent for a time to a static endgame. But Fischer manages to burst his bonds, only to blunder on the very next move (51...Kd6). Petrosian, however, by blundering in his turn, restores the balance. The ensuing rook and pawn ending produces a thrilling draw.