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Colle System: Siroccopteryx Variation A40

A — Flank openings · Family: Colle System · basic reference page

1. d4 g6 2. Nf3 Bg7 3. e3 c5 4. Bd3 cxd4 5. Nxd4 Qa5+

🎓 Train this family

• Position after 10 half-moves — White to move.
• Material is balanced.
• Family “Colle System” contains 3 recorded variation(s) here.

Variations tree of the Colle System family

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Variations of this family

Related openings

Nearby ECO codes in the A — Flank openings volume — compare the move orders:

• Australian Defense (A40)
• English Defense (A40)
• Englund Gambit (A40)
• Englund Gambit Declined (A40)
• Horwitz Defense (A40)
• Mikenas Defense (A40)