ECO D30
ECO D00–D99 — Closed and Semi-Closed Games: 1.d4 d5 queen's pawn openings and the Grünfeld Defense.
10 named opening lines are classified under ECO code D30.
- Queen's Gambit Declined — 1.d4 d5 2.c4 e6
- Queen's Gambit Declined: Capablanca Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 h6
- Queen's Gambit Declined: Semmering Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2 Nbd7 6.Bd3 c5
- Queen's Gambit Declined: Spielmann Variation — 1.d4 d5 2.c4 e6 3.Nf3 Nf6 4.e3 c6 5.Nbd2 g6
- Queen's Gambit Declined: Stonewall Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2 Ne4 6.Bd3 f5
- Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch — 1.d4 d5 2.c4 e6 3.Nf3 c5
- Queen's Gambit Declined: Tarrasch Defense, Pseudo-Tarrasch Bishop Attack — 1.d4 d5 2.c4 e6 3.Nf3 c5 4.cxd5 exd5 5.Bg5
- Queen's Gambit Declined: Traditional Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5
- Queen's Gambit Declined: Vienna Variation — 1.d4 Nf6 2.c4 e6 3.Nf3 d5 4.Bg5 Bb4+
- Semi-Slav Defense: Quiet Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.e3 e6 5.Nbd2