A strong first half was followed by a lacklustre second as the Spireites fell to a 5-2 defeat at the hands of play-off chasing Peterborough United at London Road.Tom Nichols' first minute opener saw a rapid response from the Spireites, who roared back into the game and took the lead after goals from Ched Evans and Liam O'Neil.
However, Gwion Edwards' fine strike punctured the Spireites' bubble on the stroke of half time, and the deflation was completed by three Posh goals after the break from Paul Taylor, a second from Nichols and a final Michael Bostwick strike.
Manager Danny Wilson was unable to diagnose exactly why the two halves were so different as he shared his frustrations with the type of goals being conceded.
"My reaction is that I'm dumbfounded really," he said. "To think that we conceded five goals like we did - four of them from distance - was a blow, particularly after the first-half performance.
"We were fantastic for large periods in the first half, we got cold with the first one, a good finish. Those are the areas that we have to have our midfield players in tighter and closing the ball down, which they weren't.
"Unfortunately we've had four of them like that today. With the goals they've not cut through us but they've struck shots well from distance and they've gone in - that's the disappointment.
"In the second half we stopped doing exactly what we were doing in the first half, when we were excellent. Possibly being 2-1 ahead we should have come in at 2-1, but a goal from distance cost us again."
The visiting squad was short of Dion Donohue, Reece Mitchell and Dan Gardner, though there were injury returns to the 18 for Sam Hird and Conor Wilkinson, with Wilson explaining the circumstances.
"The three of them are injured," he said of the missing trio. "But the boys who came in did well. Rai (Simons) came in, he did alright on Tuesday and he did alright again today.
"With Sam and Conor, they're nowhere near ready yet but we need someone on the bench and we needed a lift, at the moment you can't really risk those coming back."