Northampton's 2-1 win over relegated Hereford leaves them needing a point from their final two games to ensure League One survival.
The win lifted Northampton out of the relegation places and they were ahead after 29 minutes with Andy holt's powerful shot.
Steve Guinan hit the woodwork for Cheltenham before Andy Williams equalised with a 30-yard effort.
But Adebayo Akinfenwa teed up Jason Crowe to score from the edge of the box and seal the three points.
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