Kelsey Gentles scored two first-half tries in Castleford's demolition of Wigan
Leaders Castleford extended their 100% start to the Women's Super League season on Sunday, while York City Knights got their first victory.
The Tigers thrashed Wigan 56-8, with Kelsey Gentles, Tara Stanley and Sinead Peach scoring two tries apiece.
They remain two points clear of St Helens, for whom Rhianna Burke crossed twice in a 34-18 win at Bradford.
Challenge Cup winners Leeds hammered Featherstone 52-0, while York got their first points by beating Wakefield.
Alisha Clayton scored a hat-trick of tries in a 20-4 victory which saw York move above their opponents and leave Trinity bottom of the table.
Results
Bradford Bulls 18-34 St Helens
Castleford Tigers 56-8 Wigan Warriors
Leeds Rhinos 52-0 Featherstone Rovers
Wakefield Trinity 4-20 York City Knights
