Play White · 20 chapters

Queen’s Gambit

Classical central play: QGD, QGA, the Slav and major countergambits. Recognise the structure before choosing a plan.

Practise repertoire

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Idea and repertoire boundaries

The starting point is 1.d4 d5 2.c4. The c-pawn challenges d5; this gambit need not be a permanent sacrifice because Bf1 often recovers c4. The course covers the ...d5 family, not every defence to 1.d4: after 1...Nf6 without ...d5 Indian defences may arise. The original 17 demo numbers are preserved; added chapters deepen the Carlsbad, QGA and Exchange Slav plans.

White’s plan

White develops Nc3 and Nf3 or chooses Nge2 in the Exchange QGD. Bc1 should reach g5/f4 before e3 when the line requires it. In the Carlsbad choose a b4-b5 minority attack or f3-e4: both matter, but require different knight arrangements. In the QGA, e3 and Bxc4 naturally recover c4 while developing. In the Slav, a4 restrains ...b5.

Black’s plan

Black seeks active ...c5 or ...e5, not merely keeping d5. In the QGD solve Bc8 through ...b6/Bb7, ...Bd7 or central exchanges. In the QGA returning c4 can be the best way to complete development. The Tarrasch accepts an isolated d5-pawn for piece freedom, while the Lasker seeks exchanges. White should understand these aims rather than treat every reply as the same setup.

Structures and pawn breaks

The Carlsbad follows cxd5 exd5 and requires distinguishing the two wings. An isolated d-pawn appears only after specific neighbouring-pawn exchanges, not simply because the opening is called Tarrasch. The symmetrical Exchange Slav opens the c-file. The Semi-Slav c6-d5-e6 triangle can disappear after ...dxc4 and ...c5. Recount the pawns after each change and identify the new weak squares.

Move order and tactics

Cambridge Springs teaches ...Qa5/...Bb4 pressure on c3, the Ragozin pins that knight and the Albin uses a ...d4 wedge. Do not recover a pawn without checking forcing moves and forks. After 2...dxc4, a stubborn ...b5 and mistaken ...cxb5 can open the Qf3-a8 diagonal: a tactical exception, not the QGA’s basic plan. In the Botvinnik and Meran, exchange order matters more than simple structural rules.

Transition to the middlegame and endgame

In the Carlsbad, c6 can become a lasting endgame target. The isolated-pawn side generally values activity and avoids complete simplification; the opponent wants blockading and exchanges. When queens disappear early in the QGA, king and rook activity can outweigh preserving every minor piece. Do not transfer a minority-attack plan to a position where the relevant c-pawn no longer exists.

How to train this course

Start with the Exchange QGD and its two White plans, then add the classical QGA and Slav. Compare Tarrasch and Semi-Tarrasch: a different recapture on d5 changes the strategy. Treat sharp Meran and Botvinnik lines as a second stage. Practise recognising Black’s reply from the early moves, then reproduce one chosen line rather than memorising all 20 at once.

Annotated variations

SAN: N — knight, B — bishop, R — rook, Q — queen, K — king.

1. QGD — Exchange Variation / Carlsbad

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 c6 7. Bd3 Nbd7 8. Qc2 O-O 9. Nge2 Re8 10. O-O Nf8 11. f3

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
2.c4 is the Queen's Gambit: White immediately challenges d5 and fights for more central space.
4... exd5
After cxd5 exd5 we reach the Carlsbad structure. White often plans the minority attack b4-b5, while Black seeks kingside play.
9. Nge2
Nge2 supports f3-e4 and keeps the knight away from pins. It is a classical Exchange Variation plan.
11. f3
f3 prepares e4 — White's second major plan alongside the minority attack.
FENr1bqrnk1/pp2bppp/2p2n2/3p2B1/3P4/2NBPP2/PPQ1N1PP/R4RK1 b - - 0 11

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2. QGD — Orthodox Defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 Nbd7 7. Rc1 c6 8. Bd3 dxc4 9. Bxc4 Nd5 10. Bxe7 Qxe7 11. O-O

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
2... e6
2...e6 defends d5 but temporarily locks in the c8-bishop — the fundamental QGD trade-off.
4... Be7
Bg5 pins the f6-knight and increases pressure on the center. This is classical Orthodox development.
8... dxc4
...dxc4 releases the tension at the right moment. Black often follows with ...Nd5 to activate the pieces.
11. O-O
After castling White has natural development and can pressure Black's c8-bishop or the center.
FENr1b2rk1/pp1nqppp/2p1p3/3n4/2BP4/2N1PN2/PP3PPP/2RQ1RK1 b - - 1 11

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3. QGD — Harrwitz Attack

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. Rc1 c5 8. dxc5 Nxc5

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
5. Bf4
Bf4 is the Harrwitz Attack. The bishop develops before e3 and actively influences the center.
7... c5
...c5 is the thematic freeing break. Black does not want to stay passive behind the e6-d5 chain.
8... Nxc5
After the exchange on c5 the structure opens and piece activity becomes more important than space alone.
FENr1bq1rk1/pp2bppp/4pn2/2np4/2P2B2/2N1PN2/PP3PPP/2RQKB1R w K - 0 9

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4. QGD — Tartakower Defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 b6 8. cxd5 Nxd5 9. Bxe7 Qxe7 10. Nxd5 exd5 11. Rc1 Be6

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
7... b6
...b6 defines the Tartakower Defense. Black prepares to solve the c8-bishop problem and accepts a more dynamic structure.
8... Nxd5
...Nxd5 activates the knight and keeps the pawn structure flexible.
11... Be6
...Be6 is often the practical solution for the c8-bishop, even though ...b6 originally hints at ...Bb7.
FENrn3rk1/p1p1qpp1/1p2b2p/3p4/3P4/4PN2/PP3PPP/2RQKB1R w K - 2 12

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5. QGD — Lasker Defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Be7 5. e3 O-O 6. Nf3 h6 7. Bh4 Ne4 8. Bxe7 Qxe7 9. cxd5 Nxc3 10. bxc3 exd5 11. Qb3 c6

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
7... Ne4
...Ne4 is the hallmark of the Lasker Defense. Black seeks exchanges to reduce White's pressure.
9... Nxc3
...Nxc3 damages White's structure but gives up an active knight. It is a deliberate positional choice.
11. Qb3
Qb3 pressures b7 and d5, exploiting Black's temporary passivity.
11... c6
...c6 stabilises d5 but delays Bc8. White should develop Bf1 and castle, then consider c4 against the c6-d5 chain or pressure on the b-file. Do not take b7 at the cost of queen and king safety.
FENrnb2rk1/pp2qpp1/2p4p/3p4/3P4/1QP1PN2/P4PPP/R3KB1R w KQ - 0 12

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6. QGD — Cambridge Springs

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Bg5 Nbd7 5. e3 c6 6. Nf3 Qa5 7. Nd2 Bb4 8. Qc2 O-O 9. Bh4 e5

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
6... Qa5
...Qa5 defines the Cambridge Springs: the queen unpins the f6-knight and immediately pressures c3.
7... Bb4
...Bb4 increases pressure on c3 and often creates tactical motifs involving the bishop on g5.
9... e5
...e5 is an ambitious central break made possible by Black's active piece placement.
FENr1b2rk1/pp1n1ppp/2p2n2/q2pp3/1bPP3B/2N1P3/PPQN1PPP/R3KB1R w KQ - 0 10

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7. QGD — Ragozin Defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Bb4 5. cxd5 exd5 6. Bg5 h6 7. Bh4 c5 8. e3 Nc6 9. Be2

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
4... Bb4
...Bb4 is the Ragozin Defense. The bishop pins the c3-knight and indirectly increases control over e4.
7... c5
...c5 is the main freeing break in the Ragozin. Black wants active play rather than passive defense of d5.
9. Be2
Be2 completes quiet development; both sides have full-fledged central and c-file play.
FENr1bqk2r/pp3pp1/2n2n1p/2pp4/1b1P3B/2N1PN2/PP2BPPP/R2QK2R b KQkq - 2 9

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8. Tarrasch Defense

1. d4 d5 2. c4 e6 3. Nc3 c5 4. cxd5 exd5 5. Nf3 Nc6 6. g3 Nf6 7. Bg2 Be7 8. O-O O-O 9. dxc5 Bxc5

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
3... c5
3...c5 is the Tarrasch Defense — Black immediately fights for the center instead of patiently defending d5.
4... exd5
After ...exd5 Black often accepts an isolated d5-pawn in return for free piece play and activity.
9. dxc5
dxc5 can lead to an isolated-pawn position with active pieces for both sides.
9... Bxc5
After ...Bxc5 Black has an isolated d5-pawn and active pieces. White seeks a d4 blockade, pressure on d5 and exchanges that favour the endgame; Black seeks activity, especially ...d4. An isolated pawn does not mean a lost position: initiative can offset its weakness.
FENr1bq1rk1/pp3ppp/2n2n2/2bp4/8/2N2NP1/PP2PPBP/R1BQ1RK1 w - - 0 10

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9. Semi-Tarrasch Defense

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e3 Nc6 7. Bd3 Be7 8. O-O O-O

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
4... c5
...c5 with the f6-knight still in place leads to Semi-Tarrasch structures.
5... Nxd5
...Nxd5 instead of ...exd5 changes the structure and lets Black avoid the typical isolated d5-pawn.
8... O-O
Both sides complete development quickly; the next battle is about central breaks and piece activity.
FENr1bq1rk1/pp2bppp/2n1p3/2pn4/3P4/2NBPN2/PP3PPP/R1BQ1RK1 w - - 5 9

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10. Queen's Gambit Accepted — Classical

1. d4 d5 2. c4 dxc4 3. Nf3 Nf6 4. e3 e6 5. Bxc4 a6 6. O-O c5 7. dxc5 Qxd1 8. Rxd1 Bxc5

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
2... dxc4
2...dxc4 accepts the gambit. Black usually does not cling to the pawn, instead using the time for development and ...c5.
5. Bxc4
Bxc4 recovers the pawn while developing a piece — the ideal QGA scenario for White.
6... c5
...c5 immediately challenges the center. It is Black's main idea in classical QGA positions.
8... Bxc5
The queens are off and White traded the d-pawn for Black’s c-pawn. This exact position has no isolated d-pawn. Develop Nb1 and Bc1 instead of mechanically applying an isolated-pawn plan.
FENrnb1k2r/1p3ppp/p3pn2/2b5/2B5/4PN2/PP3PPP/RNBR2K1 w kq - 0 9

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11. Queen's Gambit Accepted — Central Variation

1. d4 d5 2. c4 dxc4 3. e4 e5 4. Nf3 exd4 5. Bxc4 Nc6 6. O-O Be6 7. Bxe6 fxe6 8. Qb3 Qd7

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
3. e4
3.e4 is the ambitious Central Variation: White builds a broad center instead of immediately recovering c4.
3... e5
...e5 counterattacks the center before White can stabilize it.
8. Qb3
Qb3 targets b7 and e6 simultaneously. The d4-pawn remains a useful black wedge: finish developing, then choose how to blockade or recover it. Doubled pawns are not automatically losing.
8... Qd7
...Qd7 defends e6 and makes long castling possible. White develops Nb1 and Bc1, then tries to blockade or recover d4. Open files matter more than counting pawns: before exchanging on d4, consider the black queen and a rook that may arrive on d8.
FENr3kbnr/pppq2pp/2n1p3/8/3pP3/1Q3N2/PP3PPP/RNB2RK1 w kq - 2 9

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12. Slav Defense — Main Line

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 dxc4 5. a4 Bf5 6. e3 e6 7. Bxc4 Bb4 8. O-O Nbd7

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
2... c6
2...c6 is the Slav Defense. Black supports d5 without locking in the c8-bishop with ...e6.
4... dxc4
...dxc4 enters the Open Slav. White usually plays a4 to make ...b5 harder.
5... Bf5
...Bf5 uses the Slav's main virtue: the c8-bishop develops outside the pawn chain.
8... Nbd7
...Nbd7 completes natural development and prepares ...c5 or ...e5 at the right moment.
FENr2qk2r/pp1n1ppp/2p1pn2/5b2/PbBP4/2N1PN2/1P3PPP/R1BQ1RK1 w kq - 3 9

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13. Slav Defense — Chebanenko System

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 a6 5. c5 Bf5 6. Bf4 Nbd7 7. e3 e6 8. Be2

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
4... a6
...a6 is the Chebanenko system. Black prepares ...b5 while keeping the center flexible.
5. c5
c5 closes the center and gains space, but gives Black clear counterplay with ...b6 or ...e5.
8. Be2
Be2 completes quiet development; the next phase revolves around maneuvering and pawn breaks.
FENr2qkb1r/1p1n1ppp/p1p1pn2/2Pp1b2/3P1B2/2N1PN2/PP2BPPP/R2QK2R b KQkq - 1 8

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14. Semi-Slav — Meran

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nbd7 6. Bd3 dxc4 7. Bxc4 b5 8. Bd3 a6 9. e4 c5 10. e5 cxd4 11. Nxb5 axb5 12. exf6 gxf6

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
4... e6
...e6 together with ...c6 creates the Semi-Slav: very solid, yet rich in sharp theoretical structures.
7... b5
...b5 is the Meran hallmark. Black gains a tempo on the bishop and expands on the queenside.
9. e4
e4 is White's main central plan — once the center opens, development becomes very concrete.
12... gxf6
After the exchanges the structure is unusual and dynamic; both sides have concrete targets rather than a simple static verdict.
FENr1bqkb1r/3n1p1p/4pp2/1p6/3p4/3B1N2/PP3PPP/R1BQK2R w KQkq - 0 13

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15. Semi-Slav — Botvinnik

1. d4 d5 2. c4 c6 3. Nf3 Nf6 4. Nc3 e6 5. Bg5 dxc4 6. e4 b5 7. e5 h6 8. Bh4 g5 9. Nxg5 hxg5 10. Bxg5 Nbd7 11. exf6 Bb7

Why these moves? Annotations · 8
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
5. Bg5
5.Bg5 in the Semi-Slav can lead to some of the most theoretical positions in chess.
5... dxc4
...dxc4 starts the Botvinnik Variation. Black takes the pawn and is ready to support it with ...b5.
8... g5
...g5! is the characteristic sharp move: Black chases the bishop and accepts king-side weaknesses for dynamic play.
10... Nbd7
...Nbd7 brings the b8-knight into play and prepares a recapture on f6 after exf6. The f8-bishop still needs development; Black has not completed mobilisation.
11... Bb7
After ...Bb7 White has an advanced f6-pawn, while Black has pressure along b7-g2 and queenside pawns. A common white route is g3 and Bg2; Black must solve Bf8’s development and the king’s destination. This tabiya requires calculation: the bishop pair alone is not a justification for sacrifices.
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16. Chigorin Defense

1. d4 d5 2. c4 Nc6 3. Nf3 Bg4 4. cxd5 Bxf3 5. gxf3 Qxd5 6. e3 e5 7. Nc3 Bb4 8. Bd2 Bxc3 9. bxc3

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
2... Nc6
2...Nc6 is the Chigorin Defense. Black prioritizes piece activity over supporting d5 with a c- or e-pawn.
4... Bxf3
...Bxf3 gives up the bishop pair but damages White's structure and speeds up Black's central play.
6... e5
...e5 is the thematic Chigorin break — Black wants to exploit activity before White consolidates.
9. bxc3
After bxc3 White retains the bishop pair, but c3 and f3 restrict some squares. Develop Bf1, secure the king and consider e4 at the right moment. Black should use the active knights and queen before the centre stabilises; White need not repair the structure immediately.
FENr3k1nr/ppp2ppp/2n5/3qp3/3P4/2P1PP2/P2B1P1P/R2QKB1R b KQkq - 0 9

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17. Albin Countergambit

1. d4 d5 2. c4 e5 3. dxe5 d4 4. Nf3 Nc6 5. a3 Be6 6. Nbd2 Qe7 7. b4 O-O-O 8. Bb2

Why these moves? Annotations · 7
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
2... e5
2...e5!? is the Albin Countergambit. Black offers a pawn to establish the d4 wedge and gain rapid development.
3... d4
...d4 is the heart of the idea: the advanced pawn cramps White and gives Black useful tempi.
7... O-O-O
Long castling shows the typical Albin character — Black seeks activity and concrete play rather than quiet equality.
8. Bb2
Bb2 increases pressure on the central d4-pawn. White still needs to develop Bf1 and choose castling. Black has the d-file and initiative, so grabbing pawns before developing is risky; a3 and b4 give space, not a completed king attack.
FEN2kr1bnr/ppp1qppp/2n1b3/4P3/1PPp4/P4N2/1B1NPPPP/R2QKB1R b KQ - 2 8

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18. Exchange — the minority-attack plan

1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. cxd5 exd5 5. Bg5 Be7 6. e3 O-O 7. Bd3 Nbd7 8. Nf3 Re8 9. O-O c6 10. Qc2 Nf8 11. Rab1 a5 12. a3

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
8. Nf3
Nf3 chooses development suited to a minority attack rather than immediate Nge2 and f3. Do not mix the two plans without a reason.
11... a5
Rab1 and a3 prepare b4-b5. The aim is to weaken c6 or leave a weak d5-pawn, not simply to advance pawns.
12. a3
...a5 restrains b4. Prepare the break with more pieces and watch for counterplay against your own king.
FENr1bqrnk1/1p2bppp/2p2n2/p2p2B1/3P4/P1NBPN2/1PQ2PPP/1R3RK1 b - - 0 12

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19. Accepted — punishing stubborn ...b5

1. d4 d5 2. c4 dxc4 3. e3 b5 4. a4 c6 5. axb5 cxb5 6. Qf3

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
3... b5
...b5 tries to keep c4 rather than develop. a4 attacks the base of that chain before White recovers the pawn.
5... cxb5
After axb5 cxb5 the f3-a8 diagonal opens. Qf3 attacks Ra8: a concrete consequence of the pawn moves.
6. Qf3
This punishes the specific ...cxb5 mistake; it is not a QGA main line. Do not hunt the rook when the opponent develops correctly.
FENrnbqkbnr/p3pppp/8/1p6/2pP4/4PQ2/1P3PPP/RNB1KBNR b KQkq - 1 6

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20. Exchange Slav — symmetry without autopilot

1. d4 d5 2. c4 c6 3. cxd5 cxd5 4. Nc3 Nf6 5. Nf3 Nc6 6. Bf4 Bf5 7. e3 e6 8. Bd3 Bxd3 9. Qxd3 Bd6 10. Bxd6 Qxd6 11. O-O O-O

Why these moves? Annotations · 6
1. d4
d4 occupies the centre and opens Bc1. The queen defends the pawn, allowing bishop development before e3.
1... d5
...d5 contests the centre symmetrically. Choosing e6/c6 or dxc4 determines the coming structure.
2. c4
c4 attacks d5. This is central play, not a plan to sacrifice a pawn without considering recovery.
3. cxd5
cxd5 simplifies the structure but does not force a draw. White can work on c-file activity and the e5-square.
11. O-O
After the bishop trades, rooks and knights matter. Rc1 and centralisation are natural, but e4 needs preparation.
11... O-O
Do not judge only by pawn symmetry. Check open files, weak squares and which side can reach the seventh rank.
FENr4rk1/pp3ppp/2nqpn2/3p4/3P4/2NQPN2/PP3PPP/R4RK1 w - - 2 12

Practise this variation

Check your understanding

What should b4-b5 achieve in the Carlsbad?

Create a c6 or d5 weakness and open a file for pieces. Space alone is not the final objective.

Why need the QGA not mean a lasting pawn deficit?

White often recovers c4 with e3 and Bxc4. Black uses the time for ...Nf6, ...e6 and ...c5.

When can an isolated pawn be an asset?

When it gives pieces activity, open files and a pawn break. Without activity, especially after exchanges, it usually needs defence.

Scope and sources

MoveForge educational treatment. Names and initial sequences were cross-checked against public opening classifications; commentary and plan selection are original. These are 20 selected chapters, not every possible move or a claim to the latest engine theory.

2026-09-17