In what year was the complex where the 2005 World Matchplay was held first opened?
2005 World Matchplay (darts):  It was held at the Winter Gardens, Blackpool between July 24 and July 30, 2005. Winter Gardens, Blackpool:  Opened in 1878, it is a Grade II* listed building, incorporating various elements built between 1875 and 1939.
1878