* the difference between WB and SB: normally they are called SB, but in formation(s) with 5 defence, they would be called WB, ie(from left to right):
LWB - LCB/LSB - CB - RCB/RSB - RWB
* WF would appears in formation 4-3-3, where the the frontline would be WF - CF - WF, or in 3-5-2, where the midfield would be 2 WF on the wide + 3 CM(according to what formation you play)