The only system that I would play that was not a five back sytem would be the 4 - 2 - 3 - 1 .
You can put 2 DM in front of your back line .
The only system that I would play that was not a five back sytem would be the 4 - 2 - 3 - 1 because you can put 2 DM in front of your back line .