Historical riddle: Was Fischer's 22.Nxd7 winning?

One of the most amazing moves in Bobby Fischer’s rich career was 22.Nxd7+ in the seventh game of the Candidates final match against Tigran Petrosian. Endgame specialist Karsten Müller wonders whether the move was objectively the best in the position or if an alternative pawn push might have been a better try. You can help him solve the historical riddle!

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Chess Room Newsletter #931

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Kingscrusher-'s Blog • Fighting against the dreaded Maroczy Bind •

Is there an advantage to moving first in chess. In the population of chess games does white (with the first move) have a statistical edge? - Quora

Can a game of chess be won with the same move that started it? - Quora

Inside Chess - Vol.5, No.18 (14-Septt-1992), PDF, Traditional Games

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Chess Room Newsletter #918