Colle System
1.Nf3 c5 2.e3 g6 3.d4 Bg7 4.dxc5 Qa5+. ECO A04–A40, 3 named variations.
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All Colle System variations
| ECO | Variation |
|---|---|
| A40 |
Pterodactyl Variation
1.d4 g6 2.Nf3 Bg7 3.e3 c5 4.Bd3 Qa5+
|
| A04 |
Rhamphorhynchus Variation
1.Nf3 c5 2.e3 g6 3.d4 Bg7 4.dxc5 Qa5+
|
| A40 |
Siroccopteryx Variation
1.d4 g6 2.Nf3 Bg7 3.e3 c5 4.Bd3 cxd4 5.Nxd4 Qa5+
|