Burns showed up at Homer's house to play on his court with Smithers. Marge asks, "Well don't you have your own court?" Smithers replies, "We did but we converted it to a human chessboard." Or something like that.
Then it cuts to a scene of a bunch of humans dressed up as pieces on a chessboard. A Black rook says, "Hey, Burns has been gone for a while, let's make a break for it!" And the King protests, "No, stay here and protect me!" But the rook and pawns run off anyone then white pieces walk across the board and beat the snot out of the king.
Tehehe