[Event "It (a)"] [Site "masterchessopen.com Vienna (Austria)"] [Round "0"] [White "Vieltorff"] [Black "Muller Hans (AUT)"] [Result "1-0"] [ECO "E15"] [Opening "Queen's Indian: 4.g3 Bb7"] 1.d4 Nf6 2.c4 e6 3.Nf3 b6 4.g3 Bb7 5.Bg2 Bb4+ 6.Bd2 Be7 7.O-O O-O 8.Nc3 d5 9.cxd5 exd5 10.Bg5 h6 11.Bxf6 Bxf6 12.e3 Re8 13.Qc2 c6 14.Rfd1 Nd7 15.Rac1 Be7 16.e4 dxe4 17.Nxe4 Rc8 18.Bh3 Ra8 19.Ne5 Nb8 20.Bg2 Bf8 21.g4 Bc8 22.f4 Be7 23.f5 f6 24.Qb3+ Kh7 25.Ng6 Nd7 26.Qf7 Bf8 27.g5 {#r} 1-0