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Bobby Fischer vs Boris Spassky · 1972 · move 24.

Which bishop move takes an advanced square on e3?

In the fourth game of the 1972 championship, Fischer takes a queenside pawn while Spassky gains active diagonals and kingside space. Black uses a bishop check threat and an open h-file to keep the balance. The later rook exchange leads to a drawn bishop ending, illustrating how active defence can change shape as pieces disappear.

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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