Marc Richards scored the decisive goal against Plymouth to help Chesterfield pick up their third win in a week.
The home side forced Richards to head Curtis Nelson's header off the line in the first half, while Andres Gurrieri struck the crossbar.
The Spireites brought on Luis Boa Morte at half-time and the Portuguese soon went close with two long-range efforts.
And it was his cross which was chested down by Jack Lester, allowing Richards to smash in the winner.
VIEWS FROM THE DRESSING ROOM
Plymouth Argyle manager Carl Fletcher told BBC Radio Devon:
"I end up sounding like a broken record but again we've dominated in every sense, but it just didn't bounce for us today. All the hard work we're putting in just isn't paying off.
"The pleasing thing is that the lads are playing well and working hard for each other. The downside is we're just not getting the results.
"We don't just smash the ball around and hope something goes our way.
"We've been working hard on getting on the front foot and keep teams defending when we can and I thought we did that well today.
"(On the penalty decision) I think the linesman was that side so I'm not sure why he's not seen it. It's just the way it's going right now, we must have driven past a few black cats or something."
Chesterfield manager Paul Cook tells BBC Radio Sheffield:
"We're delighted again. Three points for any team on any day is a great achievement.
"Level of performance is important and today our level of performance was through commitment and effort.
"We weren't good in the game. We never moved the ball as well as we did the other night against Cheltenham.
"But we certainly had no lack of commitment and effort.
"Plymouth were good value for a point. We must accept that but that happens in football."
Live Text Commentary
Full Time The referee brings the game to a close.90:00 +4:01
Effort from the edge of the penalty box by Alex MacDonald goes wide of the right-hand upright.90:00 +1:59
Rene Gilmartin takes the free kick.90:00 +1:59 Booking
Booking Jack Lester is cautioned by the ref for time wasting.90:00 +1:51
Jack Lester concedes a free kick for a foul on Durrell Berry.90:00 +0:21
Unfair challenge on Onismor Bhasera by Tendayi Darikwa results in a free kick. Alex MacDonald crosses the ball from the free kick right-footed from left wing, save by Tommy Lee. Corner from right by-line taken by Alex MacDonald.87:25
The assistant referee flags for offside against Jack Lester. Indirect free kick taken by Rene Gilmartin.86:51
Rhys Griffiths is flagged offside by the assistant referee. Tommy Lee takes the free kick.86:40
The referee gives a free kick against Jack Lester for handball. Conor Hourihane restarts play with the free kick.85:12
Maxime Blanchard concedes a free kick for a foul on Jack Lester. Sam Hird takes the direct free kick.81:45
Sam Togwell takes the free kick.81:45 Substitution
Substitution Craig Clay comes on in place of Marc Richards.81:45
Foul by Curtis Nelson on Nathan Smith, free kick awarded.77:32
Inswinging corner taken from the left by-line by Alex MacDonald.74:51 Substitution
Substitution Rhys Griffiths replaces Nick Chadwick.74:51 Substitution
Substitution Guy Madjo replaces Paris Cowan-Hall.74:17
Handball by Marc Richards. Conor Hourihane takes the direct free kick.73:52
Effort on goal by Luis Boa Morte from outside the box goes harmlessly over the bar.73:06
Conor Hourihane produces a header from inside the area that goes over the bar.72:01
Durrell Berry restarts play with the free kick.
Substitution Joe Lennox is brought on as a substitute for Andres Gurrieri.72:01
Unfair challenge on Durrell Berry by Luis Boa Morte results in a free kick.70:48
Direct free kick taken by Alex MacDonald.70:48 Booking
Booking Booking for Sam Hird for unsporting behaviour.70:35
Free kick awarded for a foul by Sam Hird on Mark Molesley.67:23
Foul by Durrell Berry on Luis Boa Morte, free kick awarded. Nathan Smith restarts play with the free kick.65:45
The assist for the goal came from Sam Hird.65:45 Goal scored
Goal! - Marc Richards - Plymouth 0 - 1 Chesterfld Marc Richards scores a goal from inside the penalty area to the top right corner of the goal. Plymouth 0-1 Chesterfield.64:49
Paris Cowan-Hall is caught offside. Indirect free kick taken by Tommy Lee.63:49
Free kick awarded for a foul by Chris Atkinson on Alex MacDonald. Durrell Berry takes the free kick.62:57
Liam Cooper takes a shot. Rene Gilmartin makes a save.62:06
Conor Hourihane produces a left-footed shot from just outside the penalty area that goes harmlessly over the target.60:07 Substitution
Substitution Danny Whitaker leaves the field to be replaced by Jack Lester.60:07
The free kick is swung in right-footed by Danny Whitaker, clearance made by Maxime Blanchard.60:07 Booking
Booking Mark Molesley goes into the book.59:51
Foul by Mark Molesley on Nathan Smith, free kick awarded.58:41
Alex MacDonald produces a right-footed shot from just outside the area that goes harmlessly over the target.58:08
Andres Gurrieri takes a shot. Save by Tommy Lee.55:53
Free kick awarded for an unfair challenge on Luis Boa Morte by Mark Molesley. Tommy Lee takes the free kick.52:55
The ball is swung over by Andres Gurrieri, save made by Tommy Lee. Paris Cowan-Hall takes a short corner. Corner taken right-footed by Alex MacDonald from the left by-line to the near post, clearance made by Sam Hird.51:57
Alex MacDonald takes the direct free kick.51:57 Booking
Booking Danny Whitaker is given a yellow card.51:31
Danny Whitaker concedes a free kick for a foul on Mark Molesley.50:42
Handball decision goes against Andres Gurrieri. Sam Hird takes the direct free kick.49:41
Luis Boa Morte produces a left-footed shot from 35 yards and missed to the left of the net.48:49
Foul by Maxime Blanchard on Danny Whitaker, free kick awarded. Luis Boa Morte restarts play with the free kick.45:01
The second half begins.45:01 Substitution
Substitution (Chesterfield) makes a substitution, with Luis Boa Morte coming on for Brennan Dickenson.45:00 +1:26 Half time
Half Time The ref blows to signal half-time.45:00 +1:07
Nick Chadwick produces a header from deep inside the six-yard box that clears the bar.43:35
Nick Chadwick gives away a free kick for an unfair challenge on Liam Cooper. Direct free kick taken by Nathan Smith.42:30
Effort from just outside the area by Alex MacDonald goes over the bar.40:48
Effort from just outside the area by Conor Hourihane goes over the target.39:26
Brennan Dickenson gives away a free kick for an unfair challenge on Paris Cowan-Hall. Free kick crossed right-footed by Alex MacDonald from right wing. Alex MacDonald takes a short corner.36:56
Nathan Smith challenges Paris Cowan-Hall unfairly and gives away a free kick. The ball is delivered by Alex MacDonald, Paris Cowan-Hall has a headed effort at goal from close range which goes wide of the left-hand post.31:41
Corner taken by Alex MacDonald. Conor Hourihane takes a shot. Tendayi Darikwa gets a block in. Inswinging corner taken by Alex MacDonald from the left by-line. Alex MacDonald takes a shot. Save by Tommy Lee. Corner taken right-footed by Alex MacDonald from the left by-line, clearance by Nathan Smith. Corner taken by Alex MacDonald from the left by-line, clearance made by Drew Talbot. Corner taken right-footed by Alex MacDonald to the near post, clearance by Drew Talbot.30:11
Free kick awarded for an unfair challenge on Marc Richards by Maxime Blanchard. Direct effort from the free kick comes in from Brennan Dickenson, save made by Rene Gilmartin.27:40
Marc Richards gives away a free kick for an unfair challenge on Onismor Bhasera. Free kick taken by Rene Gilmartin.25:50
A cross is delivered by Conor Hourihane, Curtis Nelson takes a shot. Save by Tommy Lee.25:11
Corner from the right by-line taken by Alex MacDonald, Marc Richards manages to make a clearance.22:16
Shot by Marc Richards from deep inside the penalty area misses to the right of the target.20:57
Effort on goal by Mark Molesley from outside the penalty box goes harmlessly over the bar.16:15
Maxime Blanchard fouled by Marc Richards, the ref awards a free kick. Free kick taken by Maxime Blanchard.14:14
Curtis Nelson takes a shot. Liam Cooper gets a block in.13:53
Short corner taken by Alex MacDonald from the right by-line.12:43
Effort from the edge of the area by Andres Gurrieri goes wide of the left-hand upright.10:06
Paris Cowan-Hall takes a shot. Save by Tommy Lee.8:30
The ball is delivered by Alex MacDonald, save by Tommy Lee.8:01
Alex MacDonald decides to take a short corner.6:42
Inswinging corner taken from the right by-line by Brennan Dickenson.1:54
Durrell Berry fouled by Brennan Dickenson, the ref awards a free kick. Durrell Berry takes the direct free kick.0:00
The referee gets the match started.
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