Skipper Sam Hird has insisted that his team-mates still believe that the play-offs aren't out of the Spireites' reach.
Paul Cook's side are within nine points of the League Two play-off places after a comprehensive 2-0 win over John Ward's resurgent Bristol Rovers on Saturday afternoon.
Goals from Jay O'Shea and Ivorian international Armand Gnadnuillet were enough to ensure all three points stayed in North Derbyshire and Hird was delighted with his side's application against the Pirates.
"A good win and I thought we were good value for it today," the skipper told Spireites Player.
"Barring the first 15 minutes, I thought we were the better side. I thought we started slowly, but the fans stuck with us and I thought we were by the far the better side in my opinion.
"Jay's was a great finish, I was right behind it and Armand, well, he's unpredictable. I honestly don't know whether he means it or not but he's strong and powerful. He can make you look silly and I feel for their lad because he got made to look a bit of a mug there."
It was another clean sheet for the Liverpudlian's side, who have now conceded just five goals in 10 games since the return of transfer-listed Neal Trotman.
It was also the first time in over 500 minutes of football that the Spireites have breached the opposition defence, with the exception of Dagenham & Redbridge captain Abu Agogo's own goal at Victoria Road.
Richard Brindley came into the side after Drew Talbot picked up a virus and Hird, who has seen himself employed in the heart of midfield recently, was impressed with the former Norwich man's performance.
"That's credit to the strikers as well, not just the back four," he added.
"As a team, we're solid. We just need to be more penetrative going forward as a team and that's what we've been working on in training. Like I said, we're working hard defensively from front to back. It's a team effort.
"He [Richard Brindley] did really well. I thought he was unlucky to get brought off against Aldershot, he was doing well. On his debut he had a really good game as well and he's come back in a and put in a really good performance."
It was a return to winning ways for Chesterfield, who suffered a heart-wrenching defeat at Whaddon Road following Paul Benson's last-gasp header for Cheltenham Town on Tuesday evening.
Cook takes his charges to the Kassam Stadium next week to face fellow mid-table outfit Oxford United, but with spirits high in the camp Hird believes it's now or never for the Spireites.
"In the last few games we haven't put the football performance in that we would have liked but we showed today we can do it and it's just putting both aspects of the game today.
"We deserved to win at Cheltenham. I'd have been disappointed with even a draw, they had one chance in the whole game and that was in the 93rd minute.
"We were unlucky there. Obviously the play-offs is still possible but a win there would have stood us in good stead.
"Confidence is really good. We've got a good group of lads here who are all together.
"We still believe while it is still possible that we can still do it. So if the fans stick behind us, we'll go to Oxford and give it a good go.
"Obviously it's going to be tough, I think we need to win eight out of nine. It's a tough ask but it's still possible."
You can watch Hirdy's interview in full exclusively on Spireites Player