ARLINGTON — For Arlington Martin’s girls basketball team, if its opponent is bringing the defensive pressure, back-door cutting is the offensive recipe for success.Friday night, junior guard Bailey Carpenter worked one to perfection, scoring an easy layup, plus a foul shot with 1:03 remaining to help lead the Warriors to a 51-48 win over Arlington Lamar at Martin’s gym. The win helped Martin (16-4, 6-1) gain sole possession of second place in District 3-5A. “It’s always about what the opponent will give us and that’s what it was tonight,” Martin coach Brooke Brittain said. “I’m just proud of how we gutted it out and stayed with it.”Carpenter went on to score Lamar’s final five points, finished with 21 points and made 3 of 6 free throws in the fourth quarter to seal things. Martin led for most of the game, but Lamar (13-6, 5-2) finally rallied in the fourth quarter with a 13-6 run. Brittany Brekenridge capped it with a layup at the 1:50 mark to give the Vikings a 45-44 lead, Lamar’s first since the 6:57 mark of the second quarter.But it wasn’t enough to withstand Martin’s motion offense.Carpenter had easy baskets on three back-door cuts and Emily Slagle had 12 points to complement the effort. Dierra Ely and Dezirae Hampton had 16 points each to pace Lamar. The Vikes struggled, though, shooting 39 percent from the floor, despite a run of 7 of 14 shooting in the fourth quarter. Martin was 15 of 42 from the floor.