D40 — Queen's Gambit Declined: Semi-Tarrasch Defense
Closed & Semi-Closed Games (D00–D99)
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5
Full page: Queen's Gambit Declined: Semi-Tarrasch Defense →ECO D40 covers Queen's Gambit Declined: Semi-Tarrasch Defense and related lines (Queen's Gambit Declined: Semi-Tarrasch Defense, Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation, Queen's Gambit Declined: Semi-Tarrasch Defense, with e3, Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation). Main line 1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5 with variations, statistics, and the best responses.
6 lines under D40
Queen's Gambit Declined: Semi-Tarrasch Defense
1. d4 Nf6 2. c4 e6 3. Nf3 d5 4. Nc3 c5
Queen's Gambit Declined: Semi-Tarrasch Defense, Pillsbury Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. Bg5
Queen's Gambit Declined: Semi-Tarrasch Defense, with e3
1. d4 d5 2. c4 c5 3. Nf3 Nf6 4. Nc3 e6 5. e3 Nc6 6. Bd3
Queen's Gambit Declined: Semi-Tarrasch Defense
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. a3 cxd4 7. exd4 Bd6
Queen's Gambit Declined: Semi-Tarrasch Defense, Symmetrical Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O
Queen's Gambit Declined: Semi-Tarrasch Defense, Levenfish Variation
1. d4 d5 2. c4 e6 3. Nc3 Nf6 4. Nf3 c5 5. e3 Nc6 6. Bd3 Bd6 7. O-O O-O 8. Qe2 Qe7 9. dxc5 Bxc5 10. e4