• English symmetrical, hedgehog system (A30)

    c4 c5 Nf3 Nf6 g3 b6 Bg2 Bb7 o-o e6 Nc3 Be7

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    English symmetrical, hedgehog, flexible formation (A30) d4 cd Qd4 d6 Rd1 a6 b3 N8d7 d4 cd Qd4 d6 Rd1 a6 b3 N8d7 English symmetrical, hedgehog, flexible formation (A30)