Colle System
What is the Colle System?
The Colle System is a chess opening that begins with 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+. It is classified under ECO A04–A40 and has 3 named variations. Black chooses it with the move Qa5+.
Moves: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
ECO: A04–A40
Chosen by: Black
Main variations
1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+
1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+
All 3 variations
| ECO | Variation | Moves |
|---|---|---|
| A40 | Pterodactyl Variation | 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+ |
| A04 | Rhamphorhynchus Variation | 1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+ |
| A40 | Siroccopteryx Variation | 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+ |
How to learn an opening
Learn the ideas before the moves: where the pieces go, which pawn breaks matter and what the typical middlegame plans are. Then play it, and after each game look up the point where you or your opponent left the known moves. MentoChess shows that point automatically for every game you import.
Opening lessons: Three golden opening rules · Scholar’s mate and how to stop it · Italian Game: plans, not just moves · Answering 1.d4: the Queen’s Gambit Declined · Meeting the Sicilian with 2.c3 · From moves to structures