I'd like to use a formation that most teams (club and country), used for over fifty years until the mid 1970's, but this game deems it to be an illegal formation. It was 2-3-2-2-1. there were Left Back & Right Back (DL & DR), Left Half, Centre Half & Right Half (DML, DMC & DMR). Inside Left & Inside Right, (MC & MC), Left Wing & Right Wing (AML & AMR), Centre Forward (ST).
But it is illegal because there are only 2 defenders.