Three-player chess. Black and white play as normal. Red starts with two pawns in the middle. Red's pawns move one space orthogonally, capture one space diagonally. If red would capture a pawn, that pawn instead becomes red. If a red pawn would capture a knight, bishop, rook, or queen, red's pawn becomes a piece of that type. Red loses if they run out of stuff. If black or white loses, their pieces stay on the board and stop making moves.