D37 — Queen's Gambit Declined: Three Knights Variation

Closed & Semi-Closed Games (D00–D99)

1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3

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ECO D37 covers Queen's Gambit Declined: Three Knights Variation and related lines (Queen's Gambit Declined: Three Knights Variation, Queen's Gambit Declined: Barmen Variation, Queen's Gambit Declined: Three Knights, Vienna Variation, Queen's Gambit Declined: Harrwitz Attack). Main line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 with variations, statistics, and the best responses.

15 lines under D37
Queen's Gambit Declined: Three Knights Variation
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3
Queen's Gambit Declined: Barmen Variation
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7
Queen's Gambit Declined: Three Knights, Vienna Variation
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4
Queen's Gambit Declined: Harrwitz Attack
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4
Queen's Gambit Declined: Vienna Variation, Quiet Variation
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 dxc4 5. e3
Queen's Gambit Declined: Three Knights Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. e3 O-O
Queen's Gambit Declined: Miles Variation
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bg5 O-O 6. Qc2
Queen's Gambit Declined: Harrwitz Attack, Fianchetto Defense
1. d4 d5 2. c4 e6 3. Nc3 Be7 4. Nf3 Nf6 5. Bf4 O-O 6. e3 b6
Queen's Gambit Declined: Harrwitz Attack, Orthodox Defense
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 Be7 5. Bf4 O-O 6. e3 c6
Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 Nbd7
Queen's Gambit Declined: Knight Defense, Alekhine Gambit
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Nbd7 5. Bg5 h6 6. Bh4 dxc4
Queen's Gambit Declined: Harrwitz Attack, Two Knights Defense, Blockade Line
1. d4 Nf6 2. c4 e6 3. Nc3 d5 4. Nf3 Be7 5. Bf4 O-O 6. e3 Nbd7 7. c5
Queen's Gambit Declined: Harrwitz Attack, Main Line
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5
Queen's Gambit Declined: Harrwitz Attack
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. Rd1 Qa5 10. a3
Queen's Gambit Declined: Harrwitz Attack
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 Be7 5. Bf4 O-O 6. e3 c5 7. dxc5 Bxc5 8. Qc2 Nc6 9. a3 Qa5 10. O-O-O
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