[Event "Ch Santa Marta"] [Site "masterchessopen.com - Santa Marta"] [Round "6"] [White "Ospino Rafael"] [Black "Acosta Efrain"] [Result "0-1"] [ECO "B00"] [Opening "Nimzowitsch Defence: 2.Nf3"] 1.e4 Nc6 2.Nf3 a6 3.Nc3 d6 4.Bc4 e6 5.d3 b5 6.Bb3 Bb7 7.O-O h6 8.Be3 g5 9.Bd4 e5 10.Be3 Be7 11.d4 Nb4 12.dxe5 d5 13.exd5 {#R} 0-1