How Capablanca Beat Lasker With the Principle of Two Weaknesses

https://www.youtube.com/watch?v=HPzFZGxPKoI
Good day, chess world! This is the game that broke a World Champion. In the tenth game of their 1921 title match in Havana, Capablanca, playing Black, reached a dead level endgame against the great Emanuel Lasker and took it apart move by move. Lasker himself called Capablanca's play from move 24 on enchanting. Capablanca called it the finest win of the match, the one that took away Lasker's last real hope. And the whole thing runs on a single endgame idea you can use this week: the principle of two weaknesses.
Watch the full breakdown here: https://www.youtube.com/watch?v=HPzFZGxPKoI
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Free Capablanca endgame notes (PDF): https://docs.google.com/forms/d/e/1FAIpQLSfVtlFBDTaYahWI-VcpZOUIGn7ly5R4mYnjoEgg2OOgHn1tzQ/viewform
Free study sheets from my Logical Chess Move by Move series: https://forms.gle/nEt1DWY5pKGq7T3n6

Why This Game Matters

One weakness a good defender can hold forever. The principle of two weaknesses says: create a second target far enough from the first that his pieces cannot guard both at once. Then the defense cracks. Capablanca does exactly this to Lasker from a level position.
This is the endgame idea that separates strong players from everyone below them. A single weak pawn is annoying but defendable, because the defender can park a piece next to it and wait. The winning method is to keep that first weakness fixed, then open a second front somewhere the defender's pieces cannot reach in time. Now he is stretched, something has to give, and you win material or the position collapses. Capablanca ran this plan against the strongest defender who ever lived, and did it so cleanly that Lasker called it enchanting. Learn to think in two weaknesses and you will win endgames you used to draw.

The Opening

This is a Queen's Gambit Declined, and Lasker, playing White, is left with an isolated queen pawn on d4. Capablanca aims his pieces at it, trades down, and by move 25, where Chernev marks the heart of Ending 32, the material is dead level but the position is not. Capablanca owns the open c-file, his pieces are beautifully placed, and Lasker is tied hand and foot to defending that lonely d-pawn. Capablanca himself wrote that this is one of his best efforts in his whole career, and against one of the strongest players the world has ever seen. His plan is simple: keep Lasker pinned to the first weakness, then manufacture a second one.

Key Moment 1: The Position Capablanca Called His Best

Here is the first weakness and the grip. Capablanca has just played 25...Nf5, a knight that does two jobs at once: it eyes the d4 pawn and it guards the c-file so Lasker can never contest it. If White tries to challenge with 26.Rc1, then 26...Rxc1 27.Qxc1 Nxd4 simply wins the pawn. So Lasker cannot trade rooks, cannot free his queen, and cannot advance his d-pawn. Everything White owns is nailed to one square. This is the quiet part of the plan, the part most players rush past: before you make a second weakness, make sure the first one is permanent and the enemy cannot wriggle free.

Key Moment 2: The Second Weakness

Now the principle bites. With the quiet 31...a5 Capablanca forced Lasker to create a second isolated pawn on b3, and after the queens came off he swung his rook behind the pawns with 36...Ra6, exactly as Tarrasch taught. Look at White's position. His rook is chained to defending two weak pawns at once, b3 and d4, and his knight and king cannot help without abandoning one of them. One weakness he could have held. Two he cannot. Capablanca will now bring his knight and king to the second front, pile up, and the material must fall. The defender has run out of pieces.

Key Moment 3: The Time Is Ripe

A pawn to the good and every white piece tied down, Capablanca switches to the second endgame plan: make a passed pawn and run it. He has spent a dozen moves walking his king up the board to help, and now he plays 64...e5, his sealed move, which he called the best way to win. After the pawns trade, his d-pawn becomes a passer that Lasker cannot stop. The king comes to d5, the pawn rolls to d4, and with the rook and knight dominating, Lasker resigned. From a dead level position Capablanca had won without a single tactic, on pure technique, and left the World Champion with nothing.

The Full Game

The Modern Take

Turn on an engine and it agrees with Capablanca at every turn, which is the point: there is no trick here, only method. The material was level deep into the ending, and Capablanca won it the hard way. He fixed Lasker to the isolated d-pawn, dominated the open file with 25...Nf5, forced a second weakness with the quiet 31...a5, and put his rook behind the pawns. Only once Lasker was stretched across two targets did a pawn fall, and only then did Capablanca make his passer and march his king up to escort it. This is the principle of two weaknesses and the two endgame plans working together against the greatest defender of the age. Small wonder Lasker called it enchanting, and that Capablanca counted it the finest win of the match.

Key Takeaways

1. One weakness holds, two win. A single weak pawn is defendable; 31...a5 forced Lasker to make a second one, and no defender can guard two targets at once.

2. Put your rook behind the isolated pawns. With 36...Ra6 Capablanca chained Lasker's rook to defending both b3 and d4, following Tarrasch's rule that the rook belongs behind the pawn.

3. Fix the first weakness before making the second. 25...Nf5 nailed Lasker to the d-pawn and guarded the c-file, so White could never free himself before the second front opened.

4. Make the passed pawn only when it is ripe, then bring the king. Capablanca walked his king up first and played 64...e5 at the perfect moment to create a passer Lasker could not stop.

What did you find most instructive? Let me know in the comments.
Watch the complete move by move lesson here: https://www.youtube.com/watch?v=HPzFZGxPKoI
See the whole Capablanca's Best Chess Endings series: https://www.youtube.com/playlist?list=PLZkwv5s1SbCANPY49gUl4Ht92K5tD8KEq