Complex sentence: The Senators and the Wanderers then played a 2-game playoff for the league championship and the Stanley Cup, and the Wanderers won 9--1,3--9 (12--10) on goals.
Split into simpler sentences: The Senators and the Wanderers would play a two-game play-off to win the league championship, and the Stanley Cup holder. The Wanderers won the play-off 9--1,3--9 (12--10) on goals.