text: Connor Farrell gave the visitors the lead before Luke Dorn went over for the hosts in his final game for Castleford.
  Solomona ran in his three tries either side of Corey Thompson putting Widnes back into the game.
  Ben Crooks, Matt Cook and Paul McShane also scored for the Tigers, Patrick Ah Van, Farrell and Thompson replying.
  The treble from Man of Steel nominee Solomona means he has scored 40 tries in the league this term - the most ever scored in a Super League campaign.
  Lesley Vainikolo and Danny McGuire jointly held the overall record of 38 tries in a season, both in 2004, however that milestone included play-off matches.
  The result means that Castleford finish in fifth place in the Super League while Widnes finish in seventh.
  Castleford: Dorn, Flynn, Webster, Minikin, Solomona, Hampshire, Gale, Cook, McShane, Springer, Holmes, Savelio, Milner.
  Replacements: Maher, Chase, Crooks, McMeeken.
  Widnes: Hanbury, Thompson, Dean, Runciman, Ah Van, Mellor, Gilmore, J Chapelhow, White, Dudson, Whitley, Farrell, Cahill.
  Replacements: T Chapelhow, Leuluai, Heremaia, Mauokafoa.
  Attendance: 7,103.
  Referee: Jack Smith
target: Denny Solomona broke the record for the most tries scored in a Super League season as his hat-trick helped Castleford beat Widnes.