King's Indian Defense: Orthodox, Exchange Variation

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.e4 d6 5.Nf3 O-O 6.Be2 e5 7.dxe5 dxe5 8.Qxd8 Rxd8 9.Bg5 Re8 10.Nd5 Nxd5 11.cxd5 c6 12.Bc4 b5 13.Bb3