The five-year-old got a checkers/chess game board for Christmas, and the older boy wanted to learn chess and got far enough to learn how to set up a chessboard.
So they’re in the parlor playing, and somehow they’re on the same side.
I believe this is the Molotov–Ribbentrop opening.
This is different from other game variants this morning, which have included Lego catapults firing checkers and Catzilla flattening the board.
I think they’re just about old enough to teach the dreaded Noggle Blitz.