Patience was required, but two Sam Clucas strikes in extra time saw the Spireites past Scunthorpe United in the FA Cup third round.
The win sets up a trip to to Derby County in the fourth round - the first time the Spireites have reached that stage since 1997, and we all know what happened that year.
Speaking after the game, Spireites assistant manager Leam Richardson was pleased to see his side through, and happy with the effect Sam Clucas had on the match after he was pushed further forwards in extra time.
He said: "The first goal's a great move from our part. In extra time we've moved him up there and thankfully he's gone into the right areas and it's Sam Clucas's night tonight.
"On a daily basis, he's got that in him has Sam. When he's in that area and he opens up you fancy him to work the 'keeper at least. Thankfully tonight he's beaten Sam Slocombe because I think over the two games he's been outstanding."
Chesterfield had the better of the match in normal time, but lacked the verve that saw them roar back to claim a replay at Scunthorpe last week.
Richardson explained what the management staff did to try and advance their side's attacking threat as the game grew older.
"We thought we could keep the ball a little bit better and we thought we could work areas a little bit better," said Richardson. "The manager was reiterating that once we get further up the pitch we must be more productive.
"I thought that from a solid base we did that a bit better as the game grew on, then once the first goal goes in Scunthorpe have to chase the game and we were able to create good areas and good chances."
With the win confirming a dream fourth round tie, Richardson confirmed his side would head to the iPro Stadium without any fear in a game his players have worked hard to take part in.
"They're the games you want to be involved in," he said. "A couple of the lads have come from non-league and various places and with the application they're showing at the moment they deserve to be playing at big stadiums.
"Derby's a tough fixture but it's great for the fans and it's great for the club financially. As a spectacle for the neutral I'm sure it's going to be a great game because they're a very good team and they're flying high themselves.
"We'll go there fully acquitted and expecting a positive result."