Game 24: Capablanca vs Mattison, Karlsbad 1929 - Brilliant Smothered Mate

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Game 24 is one of the most celebrated games in all of chess literature. Capablanca, playing White, builds a model position in the Nimzo-Indian Defence, develops every single piece to its ideal square in the fewest moves possible, and then launches a devastating kingside attack that ends in a spectacular queen sacrifice and smothered mate. This is precision chess at the highest level.

Why This Game Matters

Chernev singles out this game as a perfect demonstration of rapid piece development and coordination. Capablanca does not look for tricks or tactics. He simply plays the best move in every position: placing his rooks on open files, his bishops on long diagonals, his knights on active squares. Then, when everything is in place, the combination plays itself.

The Opening: Nimzo-Indian Defence

After 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4, Black uses the Nimzo-Indian Defence to challenge White's centre immediately. Capablanca meets it with 4.Qc2, the Classical Variation, avoiding doubled pawns. After 5.dxc5 Bxc5 6.Nf3, White recovers the pawn and retains a harmonious structure. By move 12, White has completed development perfectly: rooks on b1 and d1, bishops on f4 and e2, knight on f3. Every piece is doing real work.

Key Position 1: 15. Ng5! (Move 15, White to move)

After 13.Rfd1! places the final rook on the ideal file and 14.cxd5 opens the position, Capablanca plays the stunning 15.Ng5!, which Chernev describes as a master stroke. The move threatens 16.Qxh7 mate, but that is only the surface. The real point is twofold: first, it forces Black to weaken the kingside with ...f5, damaging the pawn cover around the king; second, it clears the f3-square for the dark-squared bishop, which will dominate the long diagonal.

Piece Activity Count

Apply the Piece Activity Count here. After 15.Ng5!, count White's active pieces: the knight on g5 threatens mate and targets f7, the bishop on f4 rakes the long diagonal, the bishop on e2 covers the kingside, both rooks are on open files, and the queen supports the operation. That is five pieces working together toward a single target. Black's forces are reactive, tied to defensive duties. When you see this kind of imbalance, an attack is not just possible, it is forced.

Rule of Three

The Rule of Three is on full display. White has at minimum three pieces directly participating in the kingside assault: the knight on g5, the bishop heading to f3 and bearing on the long diagonal, and the rooks on b1 and d1 controlling critical files. Three pieces, all coordinated, all pointing at the same weakness. That is enough to force a decisive result. Watch the full breakdown on ChessExcellence.

Key Position 2: 19. a3! (Move 19, White to move)

After 16.Bf3! gives the bishops tremendous raking power and 17.c4! drives away the defensive knight, Capablanca plays 19.a3!, which Chernev calls the start of a beautiful combination. The move attacks the knight on b4, forcing it to a6. This clears the way for the decisive sequence: 20.Bxc6 Qxc6 21.c5+ Kh8 22.Nf7+ Kg8 23.Nh6+ Kh8 24.Qg8+!! Rxg8 25.Nf7#. A queen sacrifice followed by a smothered mate. One of the most elegant finishes in chess history.

Full Game: Capablanca vs Mattison, Karlsbad 1929

1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.Qc2 c5 5.dxc5 Nc6 6.Nf3 Bxc5 7.Bf4 d5 8.e3 Qa5 9.Be2 Bb4 10.O-O Bxc3 11.bxc3 O-O 12.Rab1 Qa3 13.Rfd1! b6 14.cxd5 Nxd5 15.Ng5! f5 16.Bf3! Qc5 17.c4! Ndb4 18.Qb3 e5 19.a3! Na6 20.Bxc6 Qxc6 21.c5+ Kh8 22.Nf7+ Kg8 23.Nh6+ Kh8 24.Qg8+! Rxg8 25.Nf7# 1-0

What Did You Find Most Instructive?

Was it the strategic master stroke 15.Ng5! that forced the kingside weakening? The coordinated bishop and pawn attack with 16.Bf3! and 17.c4!? Or the magnificent queen sacrifice 24.Qg8+!! leading to smothered mate? Let me know in the comments. I read every one.

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