Doubled Pawns Are Not Automatically Weak
The Exchange Ruy and Sämisch Nimzo produce doubled pawns for opposite reasons. Judge the front pawn, the majority, and what the capture changed.
Spassky accepted doubled c-pawns on move seven of game five against Fischer in Reykjavik. Twenty moves later Fischer played 27...Bxa4!, and Spassky resigned. It is tempting to read the result backwards and blame the doubling. That misses the useful part of the game. White had received the bishop pair and a broad centre; the trouble began when the centre stopped moving and the c4-pawn became one of several fixed targets.
That distinction is the whole subject. Doubled pawns are a shape, not an evaluation. Ask whether they can move, whether they spoil a majority, and what the capture changed around them.
Start with the front pawn
The rear pawn cannot advance until the front pawn moves. The two pawns cannot defend each other, and if the front one is fixed, a piece may have to guard it for a long time. This is the same test that matters for any weak pawn: can the opponent attack it, and does defending it make the rest of your position worse?
After bxc3, the pawns on c2 and c3 cannot protect each other. The new c3-pawn controls b4 and d4, while the b-file is half-open. Neither fact decides the position by itself. — 4k3/pppppppp/8/8/8/2P5/P1PPPPPP/4K3 w - - 0 1
Doubling also leaves one fewer file occupied by a pawn. That can matter in a pawn ending, where a healthy majority needs enough separate files to create a passed pawn. In a middlegame, the vacated file may be more useful than the lost mobility. A rook can use it, as long as there is an entry square; the open-files guide explains why the file alone is not enough.
What did the capture change?
The usual diagram of doubled pawns hides the move that created them. A pawn that captures from b2 to c3 opens the b-file and adds control of d4. If the opponent gave up a bishop on c3, White may also have gained the bishop pair. Those are present advantages. The weakened pawn structure may not matter until much later.
Kingside doubling deserves even more care. After a capture on f3, gxf3 can strengthen e4 and open the g-file, but it also loosens the king and may leave an endgame target. It can be an attacking resource when the rook and centre are ready to use it. It is not automatically good in the middlegame or bad in the endgame; king safety and piece activity decide how much time the structure has.
When a majority stops working
The Exchange Ruy Lopez gives the cleanest case against doubled pawns. After White exchanges the d-pawn for Black's e-pawn, this skeleton can arise:
White's four kingside pawns can create a passed pawn against Black's three. Black also has four against three on the queenside, but the doubled c-pawns cannot create a passer without help. That gives White the clearer pawn-ending plan, not an automatic win. — 4k3/ppp2ppp/2p5/8/4P3/8/PPP2PPP/4K3 w - - 0 1
The structural idea begins on move four:
The Exchange Ruy Lopez. White gives up the bishop pair to damage Black's queenside majority. The familiar pawn-ending advantage appears after the usual central exchange of White's d-pawn for Black's e-pawn; it is not a forced win straight from the opening. — 1. e4 e5 2. Nf3 Nc6 3. Bb5 a6 4. Bxc6 dxc6
White would like to exchange pieces and let the healthy kingside majority become important. Black wants active piece play and a useful bishop pair before that ending arrives. The position is a good example of the decision to simplify: an exchange helps only when it brings your lasting advantage closer to the foreground.
Doubled isolated pawns are usually more serious. With no neighbouring pawn, neither member of the pair can be pawn-defended, and one open file can expose both. Even here, activity can compensate. But if two recaptures are otherwise similar, avoiding doubled isolated pawns is a strong reason to prefer one of them.
The Sämisch Nimzo gives both sides a case
The Nimzo-Indian creates a less one-sided argument:
In the Sämisch Nimzo-Indian, White accepts doubled c-pawns and gains the bishop pair, a broad centre and the half-open b-file. Black will try to fix c4 before those active features take over. — 1. d4 Nf6 2. c4 e6 3. Nc3 Bb4 4. a3 Bxc3+ 5. bxc3
White's c-pawns are not weak merely because they share a file. Black first has to stop the front pawn from advancing or exchanging itself. The usual ...c5 does that. Then ...Nc6-a5 and ...Ba6 can attack c4 while exchanges remove its piece defenders. This is the siege method from Weak Pawns and Targets, but the method only works if White's centre and bishops can be contained.
Black has fixed c4 with ...c5 and attacks it with the knight on a5 and bishop on a6. Bd3 and Nd2 hold it for now. The queen on d7 can also join from a4 if the timing is right. — 6k1/p2q1ppp/bp1ppn2/n1p5/2PPP3/P1PB4/3NQPPP/2B3K1 w - - 0 1
The position contains two honest plans. White needs central or kingside play while the bishop pair and space still matter. Black is willing to defend first because c4 will remain available as a target. The doubled pawn does not settle the argument; it sets the terms.
Fischer makes the targets stand still
The Hübner Wall in Spassky-Fischer, World Championship 1972, game 5 shows the bad version. The opening's bishop-versus-knight tradeoff is also examined in Knight vs Bishop.
Fischer met White's centre with ...c5 and ...e5. After 16.a4, he replied 16...a5, leaving White with fixed pawns on a4, c4 and e4. The bishops had no open centre to exploit, while the pawns kept needing defenders. On move 27, White's queen on c2 was responsible for both a4 and e4. Fischer's 27...Bxa4! forced it to choose. Spassky resigned because 28.Qxa4 Qxe4 leaves White facing forced mate. Stockfish 17.1 confirms both 27...Bxa4 as the best move and the forced mate after the capture, at depth 30.
The game is not proof that the Sämisch structure is unsound. It is a lesson in what happens when its active compensation disappears. That same closed-centre problem is the other half of the Hübner Wall discussion in Knight vs Bishop.
Decide before you recapture
Do not choose a recapture from the slogan "toward the centre." Compare the two positions it leaves. Can the front doubled pawn move or trade itself? Does the pair damage a majority that may matter in an ending? Did the capture open a file, gain central control, or secure the bishop pair?
The answer can also change with exchanges. Files and bishops are immediate piece assets; a crippled majority is a long-term endgame problem. The exchange decision should move the game toward the feature that favours you.
When playing against doubled pawns, fix the front pawn before piling up on it. If it can advance or exchange itself, there may be no target. When playing with them, use the open file, centre or bishop pair before the opponent turns the front pawn into a permanent job for one of your pieces.