ECO D45

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

9 named opening lines are classified under ECO code D45.

• Semi-Slav Defense: Accelerated Meran Variation — 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 a6
• Semi-Slav Defense: Main Line — 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3
• Semi-Slav Defense: Normal Variation — 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7
• Semi-Slav Defense: Rubinstein System — 1.d4 d5 2.c4 e6 3.Nc3 c6 4.Nf3 Nf6 5.e3 Nbd7 6.Ne5
• Semi-Slav Defense: Stoltz Variation — 1.d4 d5 2.c4 c6 3.Nc3 Nf6 4.e3 e6 5.Nf3 Nbd7 6.Qc2
• Semi-Slav Defense: Stoltz Variation, Center Variation — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.e4
• Semi-Slav Defense: Stoltz Variation, Center Variation, Mikhalchishin Line — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.e4 dxe4 8.Nxe4 Nxe4 9.Qxe4 e5 10.dxe5
• Semi-Slav Defense: Stoltz Variation, Shabalov Attack — 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.e3 Nbd7 6.Qc2 Bd6 7.g4
• Semi-Slav Defense: Stonewall Defense — 1.d4 d5 2.Nf3 Nf6 3.c4 c6 4.Nc3 e6 5.e3 Ne4 6.Bd3 f5