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Viswanathan Anand vs Magnus Carlsen · 2013 · move 22.

White has just pushed f5. How can Black turn the b-pawn into a promotion threat away from the king?

In the ninth game of the 2013 world championship in Chennai, Anand’s kingside attack raced Carlsen’s queenside passed pawn. Track both threats at once. The final position is especially useful for learning why a natural defensive move can fail when the opponent’s queen gains a new route.

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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