The Spireites recorded a comprehensive victory at Torquay United, winning 5-1 in Devon.
Jamie Grimes, Darren Oldaker, Bailey Clements, Jes Uchegbulam and Kabongo Tshimanga scored the goals, the latter two after stepping off the bench.
Paul Cook named an unchanged starting line-up with Laurence Maguire returning to the substitutes bench after recovering from a knock.
Grimes struck in the eighth minute, meeting Jeff King’s corner with a downward header which saw the ball go inside Mark Halstead’s right-hand post.
A promising move ended with Joe Quigley firing in a low shot which was saved by Halstead at his near post.
Armando Dobra then tried a 20-yard effort which went over.
Torquay defender Mark Ellis saw his shot go wide and then Stephen Wearne sent a low ball across the face of goal but there was no-one there to apply the finishing touch.
The hosts equalised on the half-hour mark with De Silva producing a far post finish following Tom Lapslie’s cross.
Ross Fitzsimons made a fine save to keep out Wearne’s header.
Tom Whelan fired in a low shot which was deflected wide.
The Spireites regained the lead following the resulting corner when Dobra laid the ball off to Oldaker (49) who curled the ball into the top left-hand corner of Halstead’s net from just outside the area.
Dobra had a long-range effort which was deflected wide before Chesterfield scored shortly before the hour-mark.
Dobra’s clever dummy let in Clements (57) who found the net with a low right-footed shot from inside the area.
The Spireites survived a scare when De Silva failed to find the unguarded net when Fitzsimons raced out of his area to try and clear.
Lapslie also had an opportunity when he had the ball at his feet just inside the area, but he failed to get an effort on target.
Fitzsimons made a great save to keep out Brett McGavin’s firm shot.
Chesterfield made a double substitution with Jes Uchegbulam and Tim Akinola replacing Dobra and Whelan.
McGavin, off-balance, then tried an effort from distance which went wide.
Uchegbulam (77) added a fourth goal after trading passes with Clements and curling the ball into the roof of the net.
Tshimanga (87) rounded off the scoring following a counter-attack, bursting into the area before producing a low finish.
Spireites: Fitzsimons, King, Williams, Grimes, Clements, Whelan (Akinola 73), Jones, Mandeville, Oldaker, Dobra (Uchegbulam 72), Quigley (Tshimanga 82)
Subs: Maguire, Akinola, Cooper, Uchegbulam, Tshimanga
