Colle System: Siroccopteryx Variation
ECO A4010 half-movesWhite to move
Moves
1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+
The Colle System: Siroccopteryx Variation (A40) reaches this position after 10 half-moves, with White to move. Want to know why each move is played, the plans for both sides, and the traps to avoid? Step through it on an interactive board while the Chess Guru explains every idea in plain English.