In an effort to freeze out the Montreal Wanderers, the ECHA disbanded in December 1909 and a new league called the Canadian Hockey Association (CHA) was formed, deliberately designed to exclude the Wanderers, who then joined the newly formed National Hockey Association (NHA). The CHA survived only a few weeks of play in January 1910 before two teams jumped to the new National Hockey Association (NHA).
Stanley Chall.
Stanley Chall.
Stanley Chall.

Pre-Season Stanley Cup Challenge

Most goals scored in 2-game series
Champions of the OPHL and CHA competed for the Stanley Cup
Date    OpponentResultScoreSeries
1/5vs Galt 12-3 12-3
1/7vs Galt 3-1 15-4

Mid-Season Stanley Cup Challenge

Best of 3-game series
During the season Ottawa as Cup champion played a challenge against Edmonton, champion of the Alberta Amateur Hockey Association (AAHA),
Date    OpponentResultScoreSeries
1/18vs EdmontonW  8-4 1-0
1/20vs EdmontonW  13-7 2-0