Catalan Opening: Open Defense, Modern Sharp Variation

1.d4 Nf6 2.c4 e6 3.g3 d5 4.Bg2 dxc4 5.Nf3 Nc6 6.Qa4 Bb4+ 7.Bd2 Nd5 8.Bxb4 Nxb4 9.O-O Rb8 10.Na3 O-O 11.Qb5