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Tigran Petrosian vs Boris Spassky · 1966 · move 21.
How can White improve coordination while allowing the material imbalance?
Tigran Petrosian’s tenth game against Boris Spassky in the 1966 world championship illustrates why a rook’s nominal value does not tell the whole story. Piece activity and weak squares shape the position, and the later tactics grow from that imbalance.
Before reaching for a move, identify the opponent’s immediate threat and the piece you most want to improve. Then compare checks, captures and quiet moves. The complete interactive lesson will let you test your answer without revealing the historical continuation first.
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