D04 — Queen's Pawn Game: Colle System
Closed & Semi-Closed Games (D00–D99)
1. d4 d5 2. Nf3 Nf6 3. e3
Full page: Queen's Pawn Game: Colle System →ECO D04 covers Queen's Pawn Game: Colle System and related lines (Queen's Pawn Game: Colle System, Queen's Pawn Game: Colle System, Anti-Colle, Queen's Pawn Game: Colle System, Grünfeld Formation). Main line 1. d4 d5 2. Nf3 Nf6 3. e3 with variations, statistics, and the best responses.
3 lines under D04
Queen's Pawn Game: Colle System
1. d4 d5 2. Nf3 Nf6 3. e3
Queen's Pawn Game: Colle System, Anti-Colle
1. d4 d5 2. Nf3 Nf6 3. e3 Bf5
Queen's Pawn Game: Colle System, Grünfeld Formation
1. d4 d5 2. Nf3 Nf6 3. e3 g6 4. Bd3 Bg7