On the Sunny Side (1942)

Because of the war, a 12-year-old boy from England, Hugh, is sent to live with the Andrews family in Ohio. Don, the Andrews' 11-year-old son, eagerly accepts the English boy and is happy when his school friends do the same. But he isn't so happy when things begin to change and his father forgoes their evening game of Chinese Checkers to play chess with Hugh who shows himself to be a formidable scholar. He impresses Don's girlfriend Betty and becomes more popular with the boys than Don was...and Don is beginning to think that Hugh is too much of a good thing. Don gets downright depressed and decides to run away. Uh, oh, here comes Hugh.