Thought it was illegal closer examination it is legal.
http://forum.topeleven.com/formation...ion-rules.html
Because this is strange, play it like a 5-4-1 so, counter with
4-4-2 classic or 3-5-2 Flat
http://forum.topeleven.com/formation...ation-use.html
Tactics 'down both flanks' as this is obviously 'through the middle'.
3-5-2 flat looks more advantageous, good luck.