ECO D27

ECO D00–D99 — Closed and Semi-Closed Games: 1.d4 d5 queen's pawn openings and the Grünfeld Defense.

4 named opening lines are classified under ECO code D27.

• Queen's Gambit Accepted: Classical Defense, Main Line — 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6
• Queen's Gambit Accepted: Classical Defense, Rubinstein Variation — 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.a4
• Queen's Gambit Accepted: Classical Defense, Russian Gambit — 1.d4 d5 2.c4 dxc4 3.e3 Nf6 4.Bxc4 e6 5.Nf3 c5 6.O-O a6 7.e4
• Queen's Gambit Accepted: Furman Variation — 1.d4 d5 2.c4 dxc4 3.Nf3 Nf6 4.e3 e6 5.Bxc4 c5 6.O-O a6 7.dxc5 Bxc5