[Event "CAN-op"]
[Site "Ottawa CAN"]
[Date "2013.07.15"]
[Round "4.13"]
[White "Du, Digeng"]
[Black "Oliva Castaneda, Kevel"]
[Result "1/2-1/2"]
[WhiteElo "2009"]
[BlackElo "2399"]
[PlyCount "79"]

1.d4 Nf6 2.c4 g6 3.Nc3 Bg7 4.Nf3 O-O 5.g3 d6 6.Bg2 Nc6 7.O-O a6 8.b3 Rb8 9.Nd5 Nh5 10.Bb2 e6 11.Nc3 Ne7 12.Rc1 b5 13.cxb5 axb5 14.Qc2 b4 15.Na4 Ba6 16.Rfd1 Rb7 17.Ne1 Ra7 18.Nd3 Qb8 19.Qd2 Bb5 20.Nxb4 Bxa4 21.bxa4 Rxa4 22.a3 Nf6 23.Rc4 Ra7 24.Rdc1 d5 25.R4c2 Nd7 26.Qd3 Qb6 27.Qd2 Rb8 28.e3 Nf6 29.Rc5 Ne8 30.Qc2 Nd6 31.Rxc7 Nc4 32.Rxa7 Qxa7 33.Ra1 Nxb2 34.Qxb2 Qa4 35.Rc1 Bf8 36.Bf1 Nf5 37.Qc3 Bxb4 38.axb4 Qxb4 39.Qxb4 Rxb4 40.Bd3 1/2-1/2