Réti Opening: Dutch Variation

1.Nf3 f5 2.g3 Nf6 3.Bg2 g6 4.O-O Bg7 5.d4 O-O 6.c4 d6 7.Nc3 Qe8 8.d5 Na6 9.Nd4 Bd7 10.e4 fxe4 11.Nxe4 Nxe4 12.Bxe4