...You're not sure anyone in the family can reliably beat your 5yo at chess anymore. (DD says she "let DS win" the last few times they played. Is this true? I'm not sure. He beats his dad about half the time and me ALL the time, but I'm terrible.)

...DS plays one game online with a pretty good player and proceeds to use the opening that player used to whomp his dad ("Where'd you learn THAT?" "The guy I played online did that"). How the $%$@ did he remember it?