Colle System: Siroccopteryx Variation
ECO A40 · Colle System
The Colle System: Siroccopteryx Variation (A40) is a chess opening in the Colle System family, played by White. It arises after the moves 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+.
Moves: 1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+
About this opening
The Siroccopteryx variation extends the Colle System's “Pterodactyl” family: after ...cxd4 and Nxd4, Black launches the ...Qa5+ check to annoy White and regain the initiative on the long diagonal. The play is asymmetrical and concrete, based on the activity of Black's fianchettoed pieces. With its whimsical name, it is a marginal, combative line, far from the beaten paths of the classical Colle.