Colle System: Siroccopteryx Variation
ECO A40 ยท 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+