1 0 0 ▁master points ▁( th us ▁the ▁name ▁to ▁ 1 9 9 5 , ▁" Master ▁M ixed ▁Teams ") ▁but ▁now ▁is ▁an ▁open ▁event . ▁ ▁It ▁was ▁originally ▁known ▁as ▁the ▁Master ▁M ixed ▁Teams . ▁In ▁ 1 9 9 6 , ▁the ▁name ▁changed ▁to ▁the ▁present ▁design ation . ▁From ▁ 1 9 4 6 ▁to ▁ 1 9 5 5 , ▁a ▁separate ▁event ▁with ▁national ▁rating ▁was ▁held ▁on ▁the ▁West ▁Coast . ▁ ▁The ▁w inners ▁have ▁their ▁names ▁ins cribed ▁on ▁the ▁Chicago ▁Tro phy . ▁ ▁W inners ▁ ▁At ▁least ▁four ▁champion ▁M ixed ▁Teams ▁def ended ▁their ▁titles ▁successfully ▁and ▁without ▁change ▁in ▁personnel , ▁in ▁ 1 9 4 4 , ▁ 1 9 5 0 , ▁ 1 9 5 3 , ▁and ▁ 1 9 7 8 . ▁The ▁ 1 9 7 7 – 7 8 ▁w inners ▁finished ▁in ▁a ▁ 3 - way ▁tie ▁in ▁ 1 9 7 9 . ▁ ▁Charles ▁G oren ▁won ▁the ▁event ▁six ▁times ▁from ▁ 1 9 3 8 ▁to ▁ 1 9 5 4 ▁and ▁Helen ▁Sob el ▁six ▁times ▁from ▁ 1 9 4 1 ▁to ▁ 1 9 6 8 , ▁five ▁times ▁as ▁team m ates . ▁ ▁West ▁Coast ▁inter l ude ▁ ▁From ▁ 1 9 4 6 ▁to ▁ 1 9 5 5 , ▁a ▁separate ▁event ▁with ▁national ▁rating ▁was ▁held ▁on ▁the ▁West ▁Coast .