Luke Varney's brace and one from Tyrone Barnett secured an emphatic 3-1 Sky Bet League Two home win for Cheltenham over Northampton.
The result maintained the impressive home form of a Robins side that was dominant from the first whistle.
Barnett initially forced David Cornell into a fine save low to his right in the 13th minute before Varney opened the scoring five minutes later, tapping in after a cross from Kevin Dawson on the right.
Varney's second - and 13th of the season - came from the penalty spot in the 41st minute after Ryan Hughes had tripped Barnett in the box.
It was almost 3-0 as the first half drew to a close, only for Barnett to head a cross from Ryan Broom just wide.
Although Northampton sent Dean Bowditch and Marvin Sordell on at the break, there was no sign of a comeback.
Cornell blocked well from Kevin Dawson in the 70th minute and the Cobblers goalkeeper did well to turn a Chris Clements' free-kick over the bar.
From the resulting corner, taken by Chris Hussey, Barnett nodded in from close range to make it 3-0.
In the 89th minute Bowditch scored a consolation goal for Northampton with a free-kick into the bottom right corner from 22 yards