Chesterfield moved into the play-off places by sending Lincoln crashing to only a second defeat in eight games.
Goalkeeper Alan Marriott was Lincoln's best player but he was left exposed when Lloyd Kerry opened the scoring.

Jack Lester drove in a fine individual goal to make it two before Ben Wright reduced the deficit after a mix-up.

Peter Leven restored Chesterfield's two-goal advantage, though, and Jamie Ward broke away 10 minutes from time to set up Kerry for the fourth.