York went two points clear at the top of the League One table after Bradford slipped up at home to Workington at the weekend.
For the second time this season, Bulls legend Leon Pryce orchestrated the downfall of his former club as Workington coach, while York defeated Hunslet 48-6.
It means with four games left, the City Knights sit in pole position to win the title and secure automatic promotion to the Championship.
The Bulls’ place in the play-offs is already confirmed, and they will be joined by three further teams, one of which is likely to be Workington, who sit third in the table.
Oldham’s slip at Newcastle at the weekend means they have both Hunslet and Whitehaven in touching distance, with Doncaster currently occupying fourth place after they recorded a vital 23-14 win at Whitehaven.
York travel to Workington in their next game, while Bradford host Keighley.
As well as their two point lead, York also boast a superior points difference by 38 points over the Bulls.
Elsewhere, North Wales hammered Hemel 50-0, while West Wales remain pointless at the foot of the table, despite a respectable 28-18 home defeat to Coventry, who have now won six games this season.