Sentence 1: I was teaching my sister how to play chess. 
 Sentence 3: So we played a game of Yahtzee instead 
 Sentence 4:  I won the first game and the next two 
 Sentence 5:  After that, I lost interest 
 Option 1: When we got to endgame tactics, she lost interest. 
 Option 2: When we got to endgame tactics, she got really excited.