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Colle System
Colle System
3 variations · Flank openings · main line
1.d4 g6 2.Nf3 Bg7 3.e3 c5 4.Bd3 Qa5+
A40
Colle System: Pterodactyl Variation
1.d4 g6 2.Nf3 Bg7 3.e3 c5 4.Bd3 Qa5+
A04
Colle System: Rhamphorhynchus Variation
1.Nf3 c5 2.e3 g6 3.d4 Bg7 4.dxc5 Qa5+
A40
Colle System: Siroccopteryx Variation
1.d4 g6 2.Nf3 Bg7 3.e3 c5 4.Bd3 cxd4 5.Nxd4 Qa5+