DS5 almost beat his grandfather in chess last night. He took Gpa's queen early on and got a number of other powerful pieces as well (came out ahead on points), but made an error late in the game when trying to checkmate and left his king momentarily unprotected. Grandpa was an extremely good player back in the day (played for his university's chess team) and is mentally still 100% there. He DOES NOT go easy on children, ever, and I could tell he was mortified to lose that queen and very relieved to win!