Semi-Tarrasch starting position
Black plays ...c5 after ...Nf6, so after cxd5 Black can often recapture with the knight and avoid the regular Tarrasch isolated queen's pawn.
Example sequence: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5
QGD Semi-Tarrasch Defense: ...Nxd5 Structure Map
The Semi-Tarrasch Defense begins with 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5. Black challenges the centre like the Tarrasch, but after 5.cxd5 Nxd5 Black often avoids the isolated queen's pawn and accepts a compact, space-conceding defence.
Quick recommendation
Start with the 5.cxd5 Nxd5 tabiya, then decide whether White wants the critical 6.e4 centre, the flexible 5.e3/6.e3 structure, or to test Black with 5...cxd4 / 5...exd5 side routes.
- Black's identity: Tarrasch-style ...c5 without automatically accepting an isolated d-pawn.
- White's critical try: 6.e4, gaining central space and attacking chances.
- White's practical alternative: 5.e3 / 6.e3 with Panov and English transpositions.
- Replay focus: Petrosian, Fischer, Kasparov, Kramnik, Aronian and modern Semi-Tarrasch battles.
QGD Semi-Tarrasch Adviser
Choose your side and problem. The adviser points to a named diagram and matching supplied replay.
Key diagrams and practice positions
Every diagram below uses a python-chess validated FEN from the stated example sequence.
Main line: 5.cxd5 Nxd5
The defining Semi-Tarrasch branch. Black avoids the isolated d-pawn, but White can build a broad centre.
Example sequence: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5
6.e4 central space
White takes the critical space-gaining route. Black exchanges on c3 and then dark-squared bishops to reduce attacking force.
Example sequence: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O
Bc4 and central rook pressure
White's classical setup: Bc4, castling, and rooks on central files to support d4-d5 and kingside pressure.
Example sequence: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nd7 12. O-O b6 13. Rad1 Bb7 14. Rfe1
d5 passed-pawn break
White's dream is d4-d5: a passed pawn that splits Black's pieces and anchors the initiative.
Example sequence: 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 5. cxd5 Nxd5 6. e4 Nxc3 7. bxc3 cxd4 8. cxd4 Bb4+ 9. Bd2 Bxd2+ 10. Qxd2 O-O 11. Bc4 Nc6 12. O-O b6 13. Rfe1 Bb7 14. Rad1 Ne7 15. d5 exd5 16. exd5
5.e3 Symmetrical Variation
White keeps central tension and may transpose to Panov, English, or IQP structures. The line is quieter but still strategically rich.
Example sequence: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. a3
5.cxd5 cxd4 endgame route
A practical side recapture. Queen trades can leave Black with doubled isolated e-pawns but active endgame chances.
Example sequence: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 cxd4 6. Qxd4 exd5 7. e4 dxe4 8. Qxd8+ Kxd8 9. Ng5 Be6 10. Nxe6+ fxe6
5.cxd5 exd5 and 6.Bg5
The rarer pawn recapture resembles regular Tarrasch structures. White often uses Bg5 and Black can answer with ...Be6.
Example sequence: 1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. cxd5 exd5 6. Bg5 Be6
Variation map
5.cxd5 Nxd5
The defining Semi-Tarrasch choice: Black avoids the isolated queen's pawn.
6.e4 centre
White takes space and asks Black to prove the simplified setup is enough.
d5 break
White's central passed-pawn dream, often paired with heavy-piece pressure.
5.e3 structure
A flexible route with Panov, English and symmetrical QGD transpositions.
Plans for White
- Play 6.e4 for ambition: gain space and force Black to exchange carefully.
- Put the bishop on c4: support central pressure and keep rooks free for the d- and e-files.
- Prepare d4-d5: the passed pawn is White's main strategic weapon.
- Use 5.e3 for flexibility: keep more pieces and lean into Panov-style isolated-pawn structures.
- Watch side recaptures: 5...cxd4 and 5...exd5 lead to very different structures.
Plans for Black
- Avoid the IQP when useful: 5...Nxd5 is the Semi-Tarrasch's key structural point.
- Exchange dark-squared bishops: ...Bb4+ and ...Bxd2 reduces White's attacking force.
- Blockade d5: White's advanced d-pawn is the main danger in the 6.e4 line.
- Use the queenside majority: the endgame plan often runs through b-pawn and c-file counterplay.
- Know the alternatives: 5...cxd4 and 5...exd5 require different defensive instincts.
Replay Lab: supplied QGD Semi-Tarrasch games
Choose a model game. The replay uses only the supplied Semi-Tarrasch PGNs, stripped to the seven mandatory replay tags and annotation-free move text.
Model-game guide
Petrosian vs Fischer
A classic Black win in the 5.e3 Symmetrical Variation.
Petrosian vs Kortschnoi
A classic central passed-pawn model for White in the 6.e4 main line.
Aronian vs Kramnik
A modern elite Black win where counterplay beats White's initiative.
Radjabov vs Van Wely
A clear attacking model with Bc4, central pressure and kingside threats.
Study path
- Start with the Semi-Tarrasch starting position and the Main line: 5.cxd5 Nxd5 diagram.
- Study 6.e4 central space and the Bc4 central rook pressure setup.
- Study the d5 passed-pawn break before choosing this as White.
- Study 5.e3 Symmetrical Variation if you prefer flexible Panov-style play.
- Finish with Petrosian vs Kortschnoi, Petrosian vs Fischer, and Aronian vs Kramnik from the Replay Lab.
Related Queen's Gambit guides
QGD Semi-Tarrasch Defense FAQs
Basics and move order
What is the QGD Semi-Tarrasch Defense?
The QGD Semi-Tarrasch Defense is 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Nf3 c5. Black strikes in the centre like the Tarrasch but can often answer cxd5 with ...Nxd5 instead of accepting an isolated queen's pawn. Start with the Semi-Tarrasch starting position diagram.
What is the main Semi-Tarrasch line?
The main line is 5.cxd5 Nxd5, after which White usually chooses 6.e4 or 6.e3. These branches lead to very different types of play. Use the Main line: 5.cxd5 Nxd5 diagram.
How is it different from the regular Tarrasch Defense?
The regular Tarrasch often leaves Black with an isolated d-pawn after ...exd5. The Semi-Tarrasch uses ...Nf6 first, making ...Nxd5 possible, but it concedes more central space. Compare the Main line diagram with the 5.cxd5 exd5 and 6.Bg5 diagram.
Is the Semi-Tarrasch solid?
Yes, but it is a space-conceding defence. Black's structure is often healthy, while White owns the centre and tries to make d4-d5 work. Use the 6.e4 central space diagram to see the strategic bargain.
Is the Semi-Tarrasch drawish?
Some main lines are simplified, but they are not lifeless. White can attack with a passed d-pawn, while Black can win with blockade and queenside counterplay. Use the d5 passed-pawn break diagram and the Replay Lab.
White systems
What is White's critical try?
White's critical try is 5.cxd5 Nxd5 6.e4, gaining a broad centre. Black usually replies ...Nxc3 and ...cxd4, then exchanges bishops with ...Bb4+. Use the 6.e4 central space diagram.
Why does White play Bc4?
Bc4 is active and keeps the rooks free for d- and e-file pressure. It supports White's central initiative and kingside ideas. Use the Bc4 and central rook pressure diagram.
When should White play d5?
White should play d5 when the central files are ready and Black cannot blockade comfortably. The advanced pawn can become White's main attacking piece. Use the d5 passed-pawn break diagram.
What is the 5.e3 Symmetrical Variation?
The 5.e3 Symmetrical Variation keeps central tension and may transpose to Panov or English structures. It is flexible rather than forcing. Use the 5.e3 Symmetrical Variation diagram.
Can White choose 6.e3 instead of 6.e4?
Yes. 6.e3 keeps more pieces and often creates IQP-style attacking chances without giving Black a simple queenside-majority plan. Use the 5.e3 Symmetrical Variation diagram.
Black plans
What is Black's plan after 6.e4?
Black exchanges on c3, challenges d4, trades dark-squared bishops with ...Bb4+, and tries to blockade d5. Use the 6.e4 central space diagram.
Why does Black play ...Bb4+?
...Bb4+ forces Bd2 and enables ...Bxd2, reducing White's attacking potential. It is a key Semi-Tarrasch simplification. Use the 6.e4 central space diagram.
What is Black's queenside majority worth?
It is an endgame asset, but Black must first survive White's central initiative. If White's d-pawn becomes dangerous, the majority may be irrelevant. Use the d5 passed-pawn break diagram.
What is the 5.cxd5 cxd4 line?
The 5.cxd5 cxd4 line is a practical side route. After Qxd4 and queen trades, Black may accept doubled isolated e-pawns. Use the 5.cxd5 cxd4 endgame route diagram.
What is the 5.cxd5 exd5 line?
The 5.cxd5 exd5 line resembles regular Tarrasch structures and is rarer than ...Nxd5. White often plays 6.Bg5. Use the 5.cxd5 exd5 and 6.Bg5 diagram.
Replay and training
Which replay is best for the classic White plan?
Petrosian vs Kortschnoi is the best supplied replay for White's classic central passed-pawn plan. Load it after studying the d5 passed-pawn break diagram.
Which replay is best for Black's classic win?
Petrosian vs Fischer is the best supplied replay for a classic Black win in the 5.e3 Symmetrical Variation. Load it after the 5.e3 diagram.
Which replay is best for a modern Black win?
Aronian vs Kramnik from the 2013 Candidates is the best supplied modern Black win. Load it after studying the Main line: 5.cxd5 Nxd5 diagram.
Which replay is best for White's central attack?
Radjabov vs Van Wely and Jakovenko vs Naiditsch are strong supplied replays for White's central attack. Start with Radjabov vs Van Wely after the Bc4 diagram.
Which replay is best for 5.cxd5 cxd4?
Giri vs Wang Yue is the best supplied replay for the 5.cxd5 cxd4 route. Load it after the 5.cxd5 cxd4 endgame route diagram.
How should I train this page in 10 minutes?
Study the starting position, 5.cxd5 Nxd5, and 6.e4 central space. Then watch one White win and one Black win from the Replay Lab.
What should I remember most?
Black avoids the regular Tarrasch IQP, but White gains space and central initiative. Use the Main line diagram as the anchor and the Replay Lab as the practical test.
Train the Semi-Tarrasch structure
Start with the 5.cxd5 Nxd5 diagram, choose 6.e4 or 5.e3, then test your branch with one supplied model game from the Replay Lab.
Study opening principles with practical Queen's Gambit examples
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