Fairy pieces in 4-Player

I've recently discovered that you can play games with fairy pieces in them in 4 player and recently I've just been creating variants and playing them. There's actually a lot of pieces to choose from, and I think we could create some of the correspondence variants in 4 player and play them live.

I just made a variant called "Bulldog Chess with Alibaba and Guard." Here's a sample game.

The FEN4:

R-0,1,0,1-1,1,1,1-1,1,1,1-0,0,0,0-0-{'royal':('h4','','g11',''),'pawnsBaseRank':5}-
3,X,X,X,X,X,X,X,X,3/
3,X,X,X,X,X,X,X,X,3/
3,X,X,X,X,X,X,X,X,3/
X,X,yR,yK,yN,yB,yK,yQ,yB,yN,yY,yR,X,X/
X,X,yP,yP,yP,yP,yP,yP,yP,yP,yP,yP,X,X/
X,X,10,X,X/
X,X,10,X,X/
X,X,10,X,X/
X,X,10,X,X/
X,X,rP,rP,rP,rP,rP,rP,rP,rP,rP,rP,X,X/
X,X,rR,rY,rN,rB,rQ,rK,rB,rN,rK,rR,X,X/
3,X,X,X,X,X,X,X,X,3/
3,X,X,X,X,X,X,X,X,3/
3,X,X,X,X,X,X,X,X,3

Interesting! I can't find how to load the FEN into the game player. Is there a way to do it?

I also looked at the collection of fairy pieces (link below) and I don't see the guard. Were you able to add it somehow?
https://www.chess.com/clubs/forum/view/the-fairy-pieces-introduction

I'll invite you to a game right now. Just make sure to be in 4 player.