The story behind the game
In game seven of the 1971 Candidates final, Fischer chooses activity over a simple rule about keeping a strong knight. He exchanges the knight on c5 for a bishop, then brings both rooks to the seventh rank. The bishop that remains becomes useful through its cooperation with those rooks.
Take these ideas to your next game
- Judge an outpost by the options it creates.
- A strong piece can be exchanged to improve the rest of the army.
- Two active rooks need coordination and targets.
- Compare a bishop and knight through their concrete tasks.
Read the complete annotated game
Full game transcript, including the result and the answers. Original explanations by chessgames.info; game score from the sources below.
Nc5 places the knight on an active square with concrete targets. The knight’s position makes Black’s bishop choose a different task. Follow how the white rooks improve while Black reorganizes. An outpost is useful because of these pressures and possibilities; its appearance alone does not decide whether it should be kept.
The game played Nxd7+; the saved search narrowly prefers a4 before making that exchange. The historical move leads to the bishop-and-rooks play shown in the game. The saved alternative keeps the active knight and gains queenside space first. Compare the actual continuations rather than treating the eventual result as a verdict on the move order.
Ree7 coordinates the two rooks on the seventh rank. Black’s king and rooks have restricted space, but the position still needs calculation. Consider the checks, the knight’s defensive squares and the advanced d-pawn. The strength of the invasion comes from cooperation rather than a promise that two rooks on the seventh always force mate.
The recorded Bc4 supports the rook on f7; the saved search prefers Rh7 and finds a mating continuation. Both the historical move and the modern candidate keep strong activity, but their saved evidence differs. The exercise asks for the rook move supported by that evidence. Follow the defensive replies in the principal line rather than claiming that the recorded bishop move was a forced mate.
Result: 1-0. The recorded score ends here; it does not imply checkmate.
Think through the turning points
Move 19: Give the knight a central task
Which move puts the a4-knight on c5 with attacks on the bishop on e6 and the a6-pawn? In the game: Nc5. Nc5 places the knight on an active square with concrete targets. The knight’s position makes Black’s bishop choose a different task. Follow how the white rooks improve while Black reorganizes. An outpost is useful because of these pressures and possibilities; its appearance alone does not decide whether it should be kept.
Engine-supported alternatives
Rec1 · +0.81 · depth 18
Nc5 a5 b5 d4 Rec1 Nd7 Nxe6+ Rxe6 Rab1 g6 Kf1 Nb6 · +0.76 · depth 18
a3 Bd7 Nb6 Ra7 Rec1 Re6 Nxd7+ Nxd7 Rc8+ Ke7 Rac1 g6 · +0.68 · depth 17
Move 22: Compare the exchange with a pawn improvement
Compare the historical knight exchange with a saved queenside pawn improvement. Which a-pawn advance does the search prefer? In the game: Nxd7+. The game played Nxd7+; the saved search narrowly prefers a4 before making that exchange. The historical move leads to the bishop-and-rooks play shown in the game. The saved alternative keeps the active knight and gains queenside space first. Compare the actual continuations rather than treating the eventual result as a verdict on the move order.
Engine-supported alternatives
a4 Bc8 Kf2 Rb8 Rb1 d4 a5 g6 Ke1 Nd7 Nxd7+ Rxd7 · +1.70 · depth 18
Nxd7+ Rxd7 Rc1 Ne8 a3 g6 Rc6 Nc7 Re1 Ne6 Rec1 Rda7 · +1.14 · depth 18
g4 Bb5 · +0.83 · depth 18
Move 31: Double on the seventh rank
White has a rook on c7 and another on e2. Which move brings both onto the seventh rank? In the game: Ree7. Ree7 coordinates the two rooks on the seventh rank. Black’s king and rooks have restricted space, but the position still needs calculation. Consider the checks, the knight’s defensive squares and the advanced d-pawn. The strength of the invasion comes from cooperation rather than a promise that two rooks on the seventh always force mate.
Engine-supported alternatives
Ree7 Nd5 Rf7+ Ke8 Rb7 Rb8 Ra7 Nf6 a3 Rc8 Bc2 Ne4+ · +2.52 · depth 20
Rh7 Rc8 Rh8+ Kf7 Rxc8 Nxc8 Re5 Rb6 Rc5 Nd6 Rd5 Ne4+ · +1.77 · depth 20
Re5 Nd5 · +1.76 · depth 20
Move 34: Compare the bishop support with a rook move
The game finished with a bishop move. Which saved rook move from f7 maintains the seventh-rank pressure and produces a mating continuation in the search? In the game: Bc4. The recorded Bc4 supports the rook on f7; the saved search prefers Rh7 and finds a mating continuation. Both the historical move and the modern candidate keep strong activity, but their saved evidence differs. The exercise asks for the rook move supported by that evidence. Follow the defensive replies in the principal line rather than claiming that the recorded bishop move was a forced mate.
Engine-supported alternatives
Rh7 Rf6 Bc4 Nd5 Bxd5 Rf8 Be6 Rg8 Bxg8 h3 gxh3 Rc8 · Mate 10 White · depth 19
Bc4 Nc6 Rh7 Rd7 Rbxd7 Na5 Rc7 Nxc4+ Rxc4 g5 Rh8+ Ke7 · +7.48 · depth 19
Rbe7+ Kd8 Rb7 Re6 Rxb4 Re7 Rf8+ Re8 Rxe8+ Kxe8 Bc4 Kf8 · +5.51 · depth 18
Every piece has a part to play.
In game seven of the 1971 Candidates final, Fischer chooses activity over a simple rule about keeping a strong knight. He exchanges the knight on c5 for a bishop, then brings both rooks to the seventh rank. The bishop that remains becomes useful through its cooperation with those rooks.
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Accessible evaluation values & provenance
Stockfish 17.1 · 75,000 nodes per position; 1,000,000 at key moments. Actual depth 12–20. Positive centipawns favour White; mate scores remain separate. Selective search is evidence, not proof.
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