So glad you asked.... I kinda fancy Hamm so I...
Acutally standard World Cup rules apply... Highest ranked plays lowest ranked...
So on the Uno/Due side Chief was highest and 5* (not having played) was lowest, Mevans an dMnieves were in the middle so they play...
Likewise on the Tre/Quattro side... it's all there on the
table. if you don't believe me.... :p