Add Chess4 to the site

Chess4 is a variant of chess involving 4 players. The rules are the same as normal chess, except for 3 rules:
1) White makes the first move followed by the person clockwise to white.
2) Pawns can change dirrection to move to the player to the left or right of yourself. Once they change, they must move in that dirrection.
3) When a player is checkmated, he/she removes her king from the board. The player who checkmated the king now has control over that player's pieces.

Chess4 board:
 
I would enjoy this site even more if this variation of chess was added.

Update:
I forgot to mention: You can also play chess4 in teams. The person across from you is your team member. (White & Black VS Gold & Silver) 

Chess4 for the square (8x8 or 10x10) board is better.

I offer to play in 3D Chess4 by two classic chess set .