“I’m pretty sure this one’s from the early 2000s. It’s historical fiction set after the Vietnam war. A boy in middle school learns to play chess from a teacher who was a veteran of the war. The boy had a baby sister called Cassie who died, possibly in a car accident? He remembers she had hair like peach fuzz. I can’t remember if the teacher ends up dating his mother or something, maybe that happened? It was one of those quiet, slice-of-life-y novels that I ate up well after I was supposed to be too old for midgrade novels, and I’d like to reread it.” A Long Way Home by Nancy Price Graff, at last found by the original requestor, Miss Amy!