"I suppose we do. You look at this place and you think about the candies and fun moments. I think of war and how great they were at creating products for the battles. You see life; I think of loss." He didn't think he'd ever stop thinking of all that loss that maybe could have been prevented if he had been smarter. "Already the little Slytherin, with green. If it's any consolation, I don't think red would have looked better. Maybe blue," he said, chuckling. "But I can imagine Ginny's reaction. I'd be more worried if you were poisoned. She'd have been mad with George in case he couldn't turn you back." Of course he didn't know if that was the case, but he thought he knew Ginny well enough to guess.
He snorted. "Did I keep it there for Hermione? It makes sense since I don't think your mother likes books any more than I do, unless things have drastically changed."
Harry wasn't interested about Muggle v. old, because it seemed like a theoretical discussion and besides he had the answers staring right at him, but then Jamie's words registered and he laughed. "That's not something in the Auror curriculum unless I added it when I became Head Auror. This was us watching a movie at the cinema, then going home and figuring out how to do it with magic. Hermione did the research naturally that led to this, but I'll teach you."
He shook his head. "Not just a chessboard, but a giant one like- Come on, you have Ron's memories. He knew how to do this when we were eleven, something that a child could do, but that requires some thinking. We have no pieces so... maybe magic to get the pieces at the right place? Look and see if you can figure it out. If not- I guess we'll need Ron. He'll be mad that he missed this."