Horham manager Al Campbell said his side were made to win ugly as they took all three points from a scrappy encounter at Broadbridge Heath on Saturday.
Goals from Matt Hough, Joe Humphreys and a brace from Jack Dean was enough to see them overcome Tulse Hill in a match that was not one for the purists.
It did, however, keep their promotion push alive and Campbell said: “If last week was our best performance of the season it was very much a case of winning ugly this week.”
Horsham seem to have made a habit of going a goal behind in recent fixtures and, true to form, let the visitors score first against the run of play.
However a few moments later, and equally true to form, John Burroughs won a short corner which Matt Hough duly despatched for his 15th strike of the season to level the scores.
Horsham never really clicked into gear, but Jack Dean did enough to find skipper Duncan Howarth at the back post to tap in.
Before the interval Joe Humphreys scored a typically virtuoso goal with a stunning reverse stick shot.
With a half-time advantage of 3-1, the home side should have been comfortable but, despite being the better side, they failed to move up a gear, once again gifting the visitors a soft goal.
Some anxious moments ensued but class finally told as Tulse Hill lost both composure and players to yellow cards.
From a goalmouth scramble Jack Dean somehow slotted from a narrow angle to settle the game and put the crowd at ease.
The win takes Howarth’s side to third in the table and, with five games left in the season, next week the team visit midtable West Hampstead.
All eyes however will be on the results of the game the week after between Banbury and Henley.
If Banbury can take even a point off the runaway league leaders, Horsham’s promotion chances look dead in the water. A Henley win would give Horsham a chance providing they win all remaining fixtures.