"Games"

Graff tells another unknown person that Ender must be isolated so he can be independent. As he's being introduced to the place and getting used to the school, Ender becomes very upset. He cries silently in his bed that night, and when Dap, the person in charge of watching Ender and his launch mates, comes to check his bed, he stopped crying. He became glad that living with Peter taught him how to hide his emotions. Ender goes to the game room, and learns the patterns in the games, challenges an older boy to play him best of three on a game, and beats him. Bernard, whose arm Ender broke, quickly becomes popular and makes fun of Ender and another kid named Shen. Ender breaks into the computer system and sends messages making fun of Bernard, which ends up breaking up Bernard's popularity and made Ender more friends.

As I was reading, I noticed that although Ender hated his brother, he benefitted from him as well. Ender's superiority is shown again, when he beats an older kid on a game he's never played before, and how he broke into the computer system to make fun of Bernard. Also, I noticed that even though Graff is trying to keep Ender isolated, he ends up making friends anyway.