[Event "Ch USA (open)"] [Site "masterchessopen.com – Pittsburgh (USA)"] [Round "0"] [White "Katz"] [Black "Hartleb G"] [Result "1-0"] [ECO "D51"] [Opening "QGD: 4.Bg5 Nbd7 5.e3"] 1.d4 d5 2.c4 e6 3.Nc3 Nf6 4.Bg5 Nbd7 5.e3 Be7 6.Nf3 O-O 7.Rc1 c6 8.Bd3 dxc4 9.Bxc4 Nd5 10.Bxe7 Qxe7 11.O-O Nxc3 12.Rxc3 e5 13.dxe5 Nxe5 14.Nxe5 Qxe5 15.f4 Qe4 16.Bb3 Be6 17.Bc2 Qb4 18.Qb1 g6 19.f5 Bd5 20.Rf4 Qa5 21.a3 Qb6 22.Rg4 c5 23.fxg6 fxg6 24.Bxg6 Qf6 25.Be4+ Kh8 26.Rf4 Qe5 27.Bxd5 Qxd5 28.Qf1 Rg8 29.g3 b6 30.Rf7 Qe5 31.Qf4 Qe6 32.Rd3 Rg4 33.Qc7 Qe4 34.Qd6 Kg8 35.Rd7 c4 36.Qd5+ Qxd5 37.R3xd5 Re4 38.Rg5+ Kf8 39.Rxh7 Rae8 40.Rh8+ Kf7 41.Rxe8 {#r} 1-0