Petrosian's Invitation

Tigran Petrosian vs Boris Spassky, World Championship, Moscow 1966 · King's Indian Defence, Fianchetto Variation · 1-0

Boris Spassky

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Tigran Petrosian

Step through the game; it stops where a move is worth finding.

Before move one

Coach

Mikhail Tal annotated this game soon after it was played. His central thread is not a computer evaluation but a human strategic question: once Black's knight goes to a5, will it justify itself on c4 or find a route back before the kingside battle begins?

Engine plan

Watch whether Black's a5-knight creates pressure on c4 or finds the b7-d8 route home.
Compare Black's queenside plan with the later commitment to a kingside pawn storm.
Notice how Petrosian invites complications only after judging which black pieces can participate.

Scoresheet

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