Blue Valley Northwest took care of business 9-3 on Thursday against Topeka's Washburn Rural in the Kansas Class 6A high school baseball finals at the University of Kansas' Hoglund Stadium.Blue Valley Northwest will square off against Derby on Friday in the semifinals. Derby knocked off Olathe Northwest 5-0.The two other quarterfinals games that had been scheduled for Thursday — Lawrence Free State vs. Haysville Campus and Shawnee Mission Northwest vs. Blue Valley — were pushed back to Friday. Class 5ABlue Valley Southwest lost a 3-2 heartbreaker in nine innings to Topeka Seaman in Wichita. Blue Valley Southwest finished the season at 16-7.Blue Valley Southwest loses heartbreaker in baseball quarterfinalsMill Valley could not get anything going against a tough Bishop Carroll team, losing 2-0 late Thursday.Class 4A, Division ITonganoxie, which has a losing record on the season, moved on to the semifinals. Tonganoxie beat Paola 3-2 in Emporia and improved to 7-16.Tonganoxie will face Bishop Miege in the semifinals. Miege knocked off Buhler. Class 4A, Division IIBishop Ward stayed alive with a 5-4 victory over St. George-Rock Creek in Salina. Ward will face Parsons in the semifinals on Friday afternoon.