Wales sevens stars Lee Williams and James Davies helped Quins seal a crucial Welsh Premiership derby victory over Llanelli at The Park.
For Llanelli defeat all but eliminates them from the league play-off stakes.
With a strong breeze in their favour, Carmarthen Quins were intent on building up a significant first-half lead. Outside-half Craig Evans set his side on their way with a fifth minute penalty, then on 17 minutes James Davies crashed over after they drove impressively from a line-out.
In the 25th minute he was followed over the line by sevens colleague Lee Williams, who stepped over after a fine, long pass from Evans. After converting, Evans added a second penalty to give Quins a 18-0 lead.
The Quins clearly felt they had the upper hand and ignored two easy penalty kicks in search of further tries.
But Llanelli, who had No. 8 Ed Price sin-binned, opened their scoring in the 40th minute when centre Jonny Evans ran in unopposed for a soft try.
After the break James Davies left the field injured and this provided more space for the impressive Llanelli openside, Daniel Thomas and busy scrum-half Justin James who nipped down the blindside for his side’s second try.
Converted by Jones, that score brought Llanelli to within four points of their rivals. With more than 20 minutes left, it looked like it was anyone’s game. But home worries were eased when Evans was on target with his third penalty of the contest, 14 minutes from time.
The Quins finished the game the stronger side and reaffirmed their position of second place in the Premiership league.
Next week sees Landovery as the visitors to the park in a massive game which should see the winners cement their place in the ply offs.
Scorers: Quins - tries: J Davies, L Williams; pens: C Evans (3); con: C Evans.
Llanelli - tries: J Lewis, J James; cons: D Jones (2).