POCATELLO — Sugar-Salem’s offense played as advertised Friday night at Idaho State University’s ICCU Dome. The state’s top 4A offense moved the ball up and down the field freely against a normally stingy Snake River defense. The quarterfinal showdown ended in a nearly identical fashion to the two teams’ early-season matchup — which the Diggers won, 41-6, at Snake River. With a 42-7 victory, Sugar-Salem advanced to the semifinals of the 4A State Football Championships. Head coach Tyler Richins said he was especially happy with his team’s performance given its extended rest. The Diggers have pla…