A30	English Opening
	Symmetrical Variation
	1.c4 c5
A30	English Opening
	Symmetrical Variation, hedgehog System
	1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7
A30	English Opening
	Symmetrical Variation, hedgehog, flexible formation
	1.c4 c5 2.Nf3 Nf6 3.g3 b6 4.Bg2 Bb7 5.O-O e6 6.Nc3 Be7 7.d4 cxd4 8.Qxd4 d6 9.Rd1 a6 10.b3 Nbd7