PRAGUE—Six players on the Czech Republic’s Olympic hockey team have tested positive for the coronavirus, national team coach Filip Pešán said Friday. The six players, all unnamed, are among a group of 12 that came from the Russia-based KHL. “It’s a complicated situation and it’s changing every hour,” Pešán said, adding none of the positive players had any symptoms. Those who tested negative will stay in a bubble in a hotel near the team’s training facility in Prague while the positive individuals will isolate at home and join the team later, depending on negative tests. The Czechs have named a preliminary 24-man squad for the Beijing Olympics. Anticipating possible positive coronavirus tests, Pešán has 30 substitutes available to step in. Former Boston Bruins center David Krejci will lead the hockey team in Beijing, where the NHL won’t participate. The 35-year-old Krejci left Boston in July after 14 NHL seasons to …