Moon Chess is a game played with the pieces from a Xiangqi Chinese Chess) set, on the squares of half a Xiangqi board. Moon Chess is sometimes described as a Xiangqi variant, but is really an entirely different game. It has some interesting similarities to Shou Dou Qi (the Jungle Game).
 
All 32 pieces are scrambled and placed face down on the squares (not points!) of one half of the Xiangqi board. Then players alternate either flipping over pieces or moving pieces of their color already flipped over.
 
All the pieces move the same way--one square up, down, right, or left, but not diagonally. You can move a piece onto any adjacent empty square, or onto an adjacent square occupied by another piece by capturing that piece, if legal. The captured piece is then removed from the board. Moving is compulsory, capturing not.
 
The men rank in this order:
General -> Mandarin -> Elephant -> Chariot -> Horse -> Soldier
 
Each piece can take any piece that's equal or lower in rank. The exception is that a pawn can take a king! The cannon is special. It can take any piece, but only by jumping over another piece, at any distance, no matter if the piece jumped over is flipped over or not. It can move one space orthogonally without capturing. Any piece except the soldier can take the cannon.
 
A game is won when you have captured all men from your opponent, or when they resign. Checkmating the king doesn't end the game.
 
The ZRF uses the iconic Xiangi pieces by Fergus Duniho, based on designs by Daniel Kian McKiernan. However, the traditional Chinese pieces are available as a alternate piece set.