Han Xiandi
Sanrenqi "Three Men Chess" is a riverless, commercial variant played on a cross-shaped board with some special rules, including a fourth, neutral country called "Han." Han has three Chariots, one Cannon, and one General named "Emperor Xian of Han", but these pieces do not move and do not belong to any of the players until a certain point in the game when two players team up against the third player. At that point the third player gets to also control Han.