[Event "Ch Netherlands (1/2 final)"] [Site "masterchessopen.com Enschede (Netherlands)"] [Round "4"] [White "Van Der Werf Mark (NED)"] [Black "Roobol Martin (NED)"] [Result "1-0"] [WhiteElo "2400"] [BlackElo "2365"] [ECO "D15"] [Opening "Slav: 4.Nc3"] 1.d4 d5 2.c4 c6 3.Nf3 Nf6 4.Nc3 e6 5.Bg5 dxc4 6.a4 b5 7.axb5 cxb5 8.Nxb5 Qb6 9.Nc3 Bb7 10.Ne5 Nc6 11.Nxc4 Qxd4 12.Qb3 O-O-O 13.Be3 Qg4 14.f3 Nd4 15.Qa4 Nc2+ 16.Qxc2 Qxc4 17.Bxa7 Nd5 18.e4 Nb4 19.Qa4 Nd3+ 20.Bxd3 Qxd3 21.Ne2 Bd6 22.Kf2 Rd7 23.Rhd1 {#r} 1-0