ECO D37
ECO D00–D99 — Closed and Semi-Closed Games: 1.d4 d5 queen's pawn openings and the Grünfeld Defense.
11 named opening lines are classified under ECO code D37.
- Queen's Gambit Declined: Barmen Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Nbd7
- 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, 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, 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: 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: 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: Miles Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 Be7 5.Bg5 O-O 6.Qc2
- Queen's Gambit Declined: Three Knights Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3
- Queen's Gambit Declined: Three Knights, Vienna Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4
- Queen's Gambit Declined: Vienna Variation, Quiet Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Nc3 dxc4 5.e3