Super League table-toppers St Helens moved 10 points clear after a 32-10 win over Wigan Warriors, while Salford surprised Warrington.
Darnell McIntosh played a starring role as Huddersfield Giants ended a four-game losing streak with victory at Salford Red Devils.
Warrington Wolves looked set to close the gap on Super League leaders St Helens, but Jonny Lomax inspired his side to yet another victory.
Normal service was resumed for leaders St Helens, who took their frustration out on Huddersfield after a stunning loss to the Broncos.
Tuimoala Lolohea scored the only try of the game in testing conditions as Leeds Rhinos moved four points clear of London Broncos.
Warrington are four points behind Super League leaders St Helens after beating Wigan, but there was nothing magic about Hull FC's weekend.
Salford Red Devils produced a fine comeback at St Helens, but there was another twist in the tale as the Super League leaders prevailed.
Warrington Wolves put the pressure on Super League leaders St Helens with a comfortable win at Castleford Tigers on Friday.
St Helens and Warrington Wolves both scored 50 points in respective wins over Catalans Dragons and Huddersfield Giants on Sunday.
Super League leaders St Helens scored 11 tries in a brutal thrashing off Hull FC, whose city rivals were also giving a hammering.