1. In combinatorial game theory , a game is impartial if it is not partisan .
2. A game is impartial in combinatorial game theory if it is not biased .

yes

1. After 2015 season Seoul FC Martyrs joined the league , but three new teams Buyeo FC , Siheung Citizen , and Yangpyeong FC left it .
2. After 2015 season Seoul FC Martyrs joined the league , but three new teams Buyeo FC , Siheung Citizen and Yangpyeong FC left them .

yes

1. The following units and commanders fought in the Battle of Changde ( late November -- early December 1943 ) , the Second Chinese - Japanese War .
2. The following units and commanders fought in the Battle of Changde ( early November -- late December 1943 ) , of the Second Sino-Japanese War .
no