A40 · Colle System
Colle System: Pterodactyl Variation
1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+
In the Colle System: Pterodactyl Variation, aim to understand the plans and pawn structures, not just memorize the first moves.
The Colle System: Pterodactyl Variation is a chess opening classified under ECO code A40. It is reached after the moves 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 Qa5+: 8 moves in, with White to play.
It belongs to the Colle System family — one of many ways the line can branch. Understanding the parent system’s plans is the fastest way to play this variation well.
Club players rarely lose the Colle System: Pterodactyl Variation in the opening itself. They lose it a few moves later, when the plan behind the moves runs out: that is what reading your own games in this line shows you.
Play the Colle System: Pterodactyl Variation? See where you go wrong.
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