Ben Fox hit the only goal of the game to secure the points and extend their gap on chasing Carlisle to seven points.
In the process the win boosted their promotion chances with the supercomputer up to 72% and doubled their chances of winning the league to 22%.
Here’s how the final table is being predicted to look.
Give us your predictions on where you think Cobblers will finish via our social media channels.
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9. Mansfield Town - 70pts (+5)
Play-off chances: 31% Promotion chances: 16% Photo: Chris Holloway

10. Walsall - 68pts (+9)
Play-off chances: 26% Promotion chances: 13% Photo: Chris Holloway

11. Tranmere Rovers - 66pts (+9)
Play-off chances: 21% Promotion chances: 10% Photo: Pete Norton

12. Doncaster Rovers - 66pts (-5)
Promotion chances: 8% Play-off chances: 19% Photo: AH Pix
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