Swansea 2 Albion 1
Albion were duffed up in Wales by a Scotsman. Two first half goals by Darryl Duffy cancelled out Alex Revell's early opener for the Seagulls.
The 23-year-old former Celtic and Glasgow Rangers striker took his tally to four goals in three starts on loan from Championship strugglers Hull.
It sealed a fourth straight home win for Swansea and sentenced the re-shaped and re-shuffled Seagulls to a fourth straight defeat.
Bradford's home defeat by Leyton Orient means Albion are virtually mathematically safe, six points clear of the Yorkshiremen with a much better goal difference.
Results elsewhere also went Swansea's way and they are now only outside the play-off zone on goal difference.
Albion boss Dean Wilkins made radical changes following the home defeat by Bradford.
Gary Hart was restored to the side for the first time since January, together with Kerry Mayo and Alex Revell.
Jake Robinson, Doug Loft and Tommy Fraser were all left out as Wilkins abandoned the midfield diamond formation and returned to an orthodox 4-4-2.
Hart, playing on the right flank, had his close friend Mayo behind him at right-back, a position he occupied in the reserves at Millwall in midweek.
Adam El-Abd moved back into the centre of the park alongside Alexis Bertin and Revell was reunited up front with Bas Savage.
The former Braintree striker scored twice against Swansea in the 3-2 win at Withdean in December and Wilkins decided to start with him, even though he is hampered by a hernia problem which requires surgery at the end of the season.
Swansea made a couple of changes to the side which drew at Bournemouth.
Alan Tate, who came on to score in spectacular style in that match, took over at right-back from Richard Duffy.
Tate also regained the captaincy from leading marksman Lee Trundle.
The other change was in midfield where Andy Robinson returned from a hamstring strain at the expense of Tom Butler.
It took only 14 minutes for the Wilkins' re-think to have an impact as Revell ended a goal drought dating back to his double against the Welshmen earlier in the season.
Sam Rents delivered a pinpoint free-kick from the right flank for the unmarked Revell to steer in a header from ten yards, his 11th of the campaign.
Pursued by team mates, he raced back into his own half to celebrate in front of the Albion fans.
It almost proved costly because, with a number of the Albion players still enjoying the moment, Swansea attacked straight from the kick-off and Trundle had a shot headed clear by Mayo.
Savage, hurt in an earlier challenge, limped off to be replaced by Robinson as soon as Albion were ahead.
The lead lasted just seven minutes, some poor defending by the Seagulls presenting Swansea with an equaliser.
A miscued clearance by Guy Butters was headed back into the Albion penalty area by Tate. The ball was allowed to bounce and Duffy nodded over the stranded Scott Flinders to add to the brace of goals he scored in the previous home game against Port Vale.
It was agitating for Albion to concede in such a soft manner, because Swansea had been giving the ball away early on and looked inhibited by their desperation for victory.
They looked unsure at the back and Albion almost regained the advantage in the 24th minute.
Hart's pass was laid off by Revell into the path of Robinson. The angle was unkind but he managed to clip an effort over keeper Willy Gueret, only for Dennis Lawrence to head away the danger close to his own line.
The defending by both sides left an awful lot to be desired. Albion allowed Ezomo Iriekpen a free header from a corner, which the central defender wasted by missing the target.
The Seagulls survived a torrid spell after that, often in rather chaotic fashion, before Swansea siezed the initiative with another goal for Duffy four minutes from the interval.
It was a fine one too, the Scotsman controlling a deep cross from Tate on his chest and turning to beat Flinders with a right-foot shot low into the bottom corner.
It was disappointing for Albion to go in behind after such an encouraging start, although they almost levelled in first half stoppage time when a clever pass from Dean Cox found Revell. He cut inside to unleash a right-foot drive which Gueret fisted clear rather uncomfortably.
The midfield diamond was restored by Wilkins in the second-half but it was Swansea who almost extended their lead soon after the break through the skilfull and innovative Trundle.
Twice the Liverpudlian tried to chip Flinders. On the first occasion he did not get enough elevation, on the second just too much.
The home side continued to look sufficiently unconvincing at the back for Albion to have hope of scoring again themselves.
They came close in the 65th minute when another accurate free-kick from the excellent Rents was met by Butters at the far post with a firm header which Iriekpen blocked.
Butters claimed Iriekpen had used his hands but the protest fell on deaf ears.
Cox, hurt by the abuse he received with Robinson from a minority of Albion fans before the Bradford match, nearly silenced his detractors with 17 minutes remaining.
The diminutive midfielder cut inside to strike a shot from 25 yards which clipped the outside of the far post, with Gueret comprehensively beaten.
The Swansea supporters were biting their fingernails again in the final minute when Tate headed into the path of Nathan Elder but the substitute, on for Hart, could not force the ball past Gueret and the keeper came to the rescue again seconds later by parrying a shot from Elder's fellow replacement Nick Ward.
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