Definitive Illegal Formation Rules

[Potemy]

Here's an illegal formation, yet it seems to meet all the requirements:
--- ST --- ST ---
------ AC -------
ML -- MC --- MR
------ -- -- DMR
DL -- DC --- DR


I know you was just testing, but what kind of manager would play with a formation like that?

Just use your common sense and football knowledge and you won't have any problems setting up the formations

What do you mean it seems to meet all the requirements? You don't know why the formation is illegal? You sound like you think it should be legal.