Chess: Secret King

Chess: Secret King is a chess variant where each player secretly chooses any of their pieces to be their king. If you manage to guess which piece is your opponents king, and take it too, you win! This present version is local PvP only, though online PvP is in development.  Please be aware the end game screen is a bit slow at the moment, looking to change in a future patch.

Major changes to original chess:

(1): Each player's king is chosen in secret by them at the beginning of the game.

(2): Checks are disabled, and players are not required to call check, nor move their king if it is being attacked. This is to ensure that figuring out which piece is the king relies on an analysis of your opponent's play.

(3): Pawn promotions are disabled. This is to limit the effectiveness of brute-forcing your way to victory, thus equalising the game somewhat where players of different skill-levels are playing.