Colle System

3 named lines, ECO A04–A40. The main position arises after1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+.

Colle System: Pterodactyl Variation after 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+ 87654321abcdefgh
LineGamesWhite / draw / Black
Pterodactyl Variation
A40 · 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+		–
Rhamphorhynchus Variation
A04 · 1. Nf3 c5 2. e3 g6 3. d4 Bg7 4. dxc5 Qa5+		3100%
Siroccopteryx Variation
A40 · 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+		–