Colle System
You play Black1. d4ECO code A40Difficulty: Medium4 moves to learn
Lines
- 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
Colle System
White builds the same simple setup in most games: pawns on the third rank, knights and bishops out, then castle.
1 opening · 1 line