Thus, the winners of these games are generally primarily determined by {HEAD ~ the relative skills} of {TAIL ~ the players} participating in them 
Thus , the winners of these games are generally primarily determined by { HEAD ~ the relative skills } of { TAIL ~ the players } participating in them
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH