[Event "It"] [Site "masterchessopen.com Wijk aan Zee (Netherlands)"] [Round "15"] [White "Portisch Lajos (HUN)"] [Black "Benko Pal C (USA)"] [Result "1/2-1/2"] [WhiteElo "2523"] [BlackElo "2408"] [ECO "E47"] [Opening "Nimzo-Indian: 4.e3 O-O 5.Bd3"] 1.d4 Nf6 2.c4 e6 3.Nc3 Bb4 4.e3 O-O 5.Bd3 c5 6.Nf3 d5 7.O-O dxc4 8.Bxc4 Nc6 9.a3 Ba5 10.Qd3 a6 11.Rd1 b5 12.Ba2 Bb7 13.dxc5 Qe7 14.Qc2 Bxc3 15.Qxc3 Ne4 16.Qc2 Nxc5 17.b3 Rfd8 18.Bb2 Rac8 19.h3 h6 20.Rac1 Rxd1+ 21.Rxd1 Nb8 22.Qd2 Ne4 23.Qd4 Qf6 24.Qxf6 gxf6 25.Ne1 Kg7 26.Rd3 Nc6 27.f3 Nc5 28.Rc3 Ne5 29.e4 a5 30.Bb1 b4 31.axb4 axb4 32.Re3 Rd8 33.Bc2 Rd2 34.Bc1 Rd8 35.Bb2 Rd2 {#d} 1/2-1/2