A48: 1 d4 Nf6 2 Nf3 g6: Torre, London and Colle Systems
1.d4 Nf6 2.Nf3 g6 3.Bg5 Ne4 4.Bf4 Bg7 5.e3 [5.Nbd2 is probably strongest 5...d5 6.e3 c5 7.c3 Nc6 8.Nxe4 dxe4 9.Nd2 cxd4 10.exd4+/= ]
5...c5 6.c3 0-0 7.Bd3 d5 8.0-0 cxd4 9.exd4 Bg4 10.Be2 Qb6 11.Qc2 Nc6 12.Nbd2 Rac8 13.a3? [13.Nxe4 Bf5 14.Qb3 Qxb3 15.axb3 Bxe4 16.Nd2+/= ]
13...Bxf3 14.Bxf3? [>=14.Nxf3 Nxd4! 15.Nxd4 Bxd4 16.Bf3=/+ ]
14...Nxd4!-+ 15.Qb1 [15.cxd4?? Rxc2-+ ]
15...Nxd2 16.Bxd2 Nxf3+ 17.gxf3 Rc4 18.Be3 Qd6 19.Re1?! [19.f4 a5-+ ]
19...Rh4 20.Qd3 [20.f4 d4 21.Bxd4 Bxd4 22.cxd4 Qxf4-+ ]
20...a6 [20...d4! 21.cxd4 Qxh2+ 22.Kf1-+ ]
21.Rad1?! [>=21.f4-+ ]
21...Qxh2+ 22.Kf1 e6 23.Ke2 Qc7 24.Bg5 Rh5 25.Be3 Qc4 26.Qxc4 dxc4 27.Rd7 Rb5 28.Rd2 h5 29.Bf4 Be5 30.Be3 Kg7 31.f4 Bf6 32.Kf3 Rd8 33.Rc2 Rd3 34.Ree2 Rd1 35.Kg2 Rbd5 36.Rcd2 R5xd2 37.Rxd2 Rxd2 38.Bxd2 b5 39.Be3 Be7 40.Bb6 Kf6 41.Kg3 Kf5 42.Bc7 f6 43.f3 e5 44.Bb8 Bc5 [44...Bc5 45.fxe5 fxe5-+ ; >=44...h4+! 45.Kg2 Kxf4 46.Ba7-+ ] 0-1