Colle System: Siroccopteryx Variation

1.
1. d4
2. g6
2.
3. Nf3
4. Bg7
3.
5. e3
6. c5
4.
7. Bd3
8. cxd4
5.
9. Nxd4
10. Qa5+

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The Colle System: Siroccopteryx Variation is a chess opening classified under ECO code A40 (Flank openings). It is a variation of the Colle System family. Step through the moves on the board above, then play the line yourself or review it with the built-in engine.