Spireites midfielder Jay O'Shea believes the play-offs are still achievable following the 2-0 win over Bristol Rovers.
The Irishman, who joined the club from MK Dons in January, rifled home his fifth goal of the season seven minutes after the restart with a venomous drive that flew into the top corner and left Pirates goalkeeper Steve Mildenhall clutching at thin air.
It was a huge relief to everyone at Whittington Moor, who had witnessed their side go over 500 minutes having only breached the opposition's resistance once courtesy of Dagenham skipper Abu Agogo's own goal in the 1-0 win at Victoria Road.
And O'Shea admitted he owes his man of the match bubbly to assistant Tommy Wright after encouraging him to have a go.
"I think it just fell for me nicely and I wanted to get a shot off," he said.
"Tommy Wright kept saying at half-time to get some shots off, he said you've got a great strike so start shooting at bit more so that was in my head.
"I was delighted. The ball broke - I think it was Hirdy or Togs that went in - i'm not too sure. I thought there was a foul in there but to shoot was the only thing on my mind.
"I don't think we've been scoring enough lately.
"We can get a bit nervous around the box and last week we didn't get a goal so it was good this week in the second half to come out and get some shots off.
"I thought we were the much better side in the second half and played some good football, which we're good at. When we do get the ball down and play, we have shown what we can do."
It was another frustrating opening 45 minutes for Cook's side, who were thankful to goalkeeper Tommy Lee for pulling off a miraculous save when he somehow pushed Oliver Norburn's rasping drive onto the inside of the post.
It was a huge reprieve for the hosts and after applying a smattering of pressure before the break, O'Shea revealed the opener relieved the tension building at the Proact Stadium.
"Obviously we're all trying our best, sometimes it just doesn't fall for you and you don't get any luck," he added.
"I think when you're at home, the crowd get a bit nervous and it shows on the pitch. The players start to get a bit nervous, but when we got the goal it was a massive weight lifted off our shoulders and then we could play our stuff.
"Armand got the second to see the game out and we were starting to look like the side when I first came here.
"We were a much better side then but in the second half we started to get back to that so hopefully we can keep that up in the run in."
With nine games to play, the Spireites have reduced the gap to the League Two play-off places to nine points and the players aren't ready to give up the fight just yet.
"I was happy with that [the man of the match award] but most importantly we got the three points.
"Anything is possible and I think if we bring today's performance in the next few games we can put a little run together and creep up the table."
You can watch Jay's interview in full exclusively on Spireites Player.