1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6 - English Opening: Symmetrical Variation, Ultra-Symmetrical Variation

English Opening: Symmetrical Variation, Ultra-Symmetrical Variation

Coups: 1. c4 c5 2. g3 g6 3. Bg2 Bg7 4. Nc3 Nc6