 At the conclusion of the 1914 – 15 season , the Senators and Wanderers finished with identical records of fourteen wins and six losses . A two @-@ game , total goal series was played to determine the NHA league champion who would contest the Stanley Cup with the Pacific Coast Hockey Association winner , the Vancouver <unk> . Ross , who finished with three goals in sixteen games in the season , scored one goal in the first match against the Wanderers , a Senators 4 – 0 victory , and though Ottawa lost the second game 1 – 0 , they won the series , 4 – 1 . To help the Senators stop the Wanderers , who were known for their speed , Ross created a new system of defence . <unk> " <unk> bar the door " , it required three defenders to align themselves across the ice 30 feet in front of the goaltender to stop offensive rushes . This style of defence would later be used in a modified version known as the neutral zone trap , later used widely to stop opposition offensive chances . 
