But after a poor start the Spireites have slipped massively down the odds. So how do the bookmakers assess the Spireites' chance of promotion now and who else do they think could take top spot?
18. leeds2vderby1986.jpg
Goals from Keith Edwards and John Sheridan won the game for the Whites. Derby won the title that season.
19. leedsvbrighton1986.jpg
Ian Baird celebrates scoring under the Elland Road floodlights.
20. leeds1vbrighton1986.jpg
The Seagulls goalie is left rooted to the spot as John Sheridan's strike hits the back of the net. Brighton finished bottom of the table that season.
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