HERE is the FEN-4
R-0,0,0,0-1,0,0,0-1,1,1,1-0,0,0,0-10-4,yN,1,yK,1,yB,1,yR,3/4,yP,yP,yB,yP,yP,yP,4/3,yR,2,yP,7/1,bP,bN,yP,2,yQ,3,yP,1,gP,gR/bR,bP,5,yN,4,gP,1/bB,bP,4,rQ,4,gP,1,gB/bK,1,bP,bQ,6,gN,gP,gN,1/1,bB,1,bP,bN,1,gR,5,gP,gK/3,bP,1,gQ,6,gP,gB/1,bP,1,rN,8,gP,1/bR,bP,1,rP,rP,5,gP,3/5,rP,1,rP,2,rN,3/6,rP,rB,rP,rP,rP,3/3,rR,1,rB,1,rK,2,rR,3
Here is the game: https://www.chess.com/4-player-chess?g=9439943
move 13.r red has a forced mate! it doesn't matter if KxQ or NxQ
HERE is the FEN-4
R-0,0,0,0-1,0,0,0-1,1,1,1-0,0,0,0-10-
4,yN,1,yK,1,yB,1,yR,3/
4,yP,yP,yB,yP,yP,yP,4/
3,yR,2,yP,7/
1,bP,bN,yP,2,yQ,3,yP,1,gP,gR/
bR,bP,5,yN,4,gP,1/
bB,bP,4,rQ,4,gP,1,gB/
bK,1,bP,bQ,6,gN,gP,gN,1/
1,bB,1,bP,bN,1,gR,5,gP,gK/
3,bP,1,gQ,6,gP,gB/
1,bP,1,rN,8,gP,1/
bR,bP,1,rP,rP,5,gP,3/
5,rP,1,rP,2,rN,3/
6,rP,rB,rP,rP,rP,3/
3,rR,1,rB,1,rK,2,rR,3
Here is the game: https://www.chess.com/4-player-chess?g=9439943
move 13.r red has a forced mate! it doesn't matter if KxQ or NxQ