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Anatoly Karpov vs Viktor Korchnoi · 1974 · move 19.

Which rook move from d1 reaches the third rank?

Karpov’s attack in the second game of the 1974 Candidates final depends on the relationship between the h-file and the centre. His rooks make room for the knights, and the e-pawn advance changes what Black can defend. Work through the forcing moves without assuming that the first open file is enough by itself.

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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