Due to balance issues, this is unlikely to work as FFA/solo, but might work as teams, though. Giving it 1-check, capture the king might even make it acceptable as teams mode - it will be simple, but still riveting. So, if you plan to submit this I suggest to make it alt teams (RG preferably), add CTK and 1-check. The amazon infiltration concept is interesting, but will not work out as FFA.
NCP - Pain in back: knight it up

Yes, I know it is unplayable. That's just an idea of making a game like this, it would be great to try something similar but new.
I'll be developing another similar game, called 'Pain in back 2: They knighted us'.
If 1-check
Not the current position of course, but with a few rows of dead pawns
https://www.chess.com/4-player-chess?g=10869859