Ponderchess / Openings
Colle System
Starts 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+. 3 named lines in the catalogue, ECO A04–A40.
Watch it in 3D
3D lesson · 10 steps · 50 seconds
The Colle System in 3D
Colle System: Pterodactyl Variation, move by move: d4 g6 Nf3 Bg7 e3 c5 Bd3 Qa5+
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A40 Colle System: Pterodactyl Variation
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