Mark Beck took his tally for the season to 11 as Darlington made it five wins in a row.
A 2-0 victory over Peterborough Sports saw Quakers move up to fifth in the table with in-form target man Beck scoring headers in each half.
Yet Peterborough were on top from an early stage with Quakers under the cosh at Blackwell Meadows.
But from Darlington’s first attack they went 1-0 up.
It came on seven minutes after a raid down the right, Jacob Hazel passed forwards to Kaine Felix and crossed to the near post where Beck headed home.
Peterborough were seeing more of the ball and creating chances without scoring. Veteran striker Michael Gash saw a header saved by Tommy Taylor, and Kyjuon Marsh Brown volleyed wide after a corner.
Felix was playing against his former club. He signed for Sports in the summer, but soon had a change of heart and moved to Darlington, and he wasted an opportunity to make it 2-0 when he scuffed a chance after Beck pulled the back from the byline.
But Quakers were 2-0 up on the hour with Beck yet again on target, this time a deft header from a Kallum Griffiths cross beating Peter Crook in the Sports goal.
Peterborough were unfortunate not to pull one back when Ryan Fyatt’s header was blocked at close-range, and Joshua McCammon hit the loose ball against a post.
From another corner, Fyatt powered a header over, at which point the visitors probably suspect it was not to be their day.
Beck was denied a hat-trick by an offside flag when he guided home another header after a Ben Hedley cross, but it was not to matter as Quakers completed the win.
They aim to make it six in a row when they face Blyth Spartans at home on Tuesday, but today’s win came at a cost Adriano Moke and Jacob Hazel both went off with injuries.
Darlington (4-3-3): Taylor; Griffiths, Lawlor, Sukar, Hedley; Moke (Rose 42), Purver, Lambert; Felix (Wheater), Beck, Hazel (Rivers 54). Subs not used: Liddle, Barbosa
Peterborough Sports (4-5-1): Crook; Williams-Lowe, Fyatt, Johnson, Fox; Sembie-Ferris, Lawlor, Kennedy (McCammon 68), Sherif, Marsh Brown (Sano Sani 59); Gash (M Jones 78). Subs not used: Hilliard, R Jones