Sharon Briggs of Montgomery Village and Brenda Seymour of Hidden Creek each won semifinal matches on the 18th hole yesterday in the Women's District Golf Association championship at International.

Briggs was three down after 14 holes, but won the last four to defeat Michelle Mackall of Montgomery Country Club, 1 up.

Seymour, a co-medalist who shot 74 in Monday's qualifier, won the 10th hole to pull even with Lois Ledbetter of Lakewood and the University of Alabama. The two tied the remaining holes until Seymour took the 18th to win, 1 up.

Briggs, who qualified for the championship flight with an 83, and Seymour will begin play in the scheduled 18-hole championship this morning at 9:40.

Mackall was 1 up at the turn and 3 up after 14. Briggs parred 15 to close within two. On the par-5 16th hole, Mackall reached the green in three and was left with a 60-foot putt. She three-putted and Briggs parred the hole.

On the par-3 17th, Mackall was on the green in two and two-putted for a bogey. Briggs, on in regulation, two-putted for par to pull even. Briggs drove solidly off the tee on the 18th, a par-4, 349-yard hole. Mackall drove into the right rough. Her second shot was shortened when it caught some leaves. She left her approach on the fringe and got a double bogey as Briggs won the hole and the match with a bogey.

In the other semifinal, Ledbetter was 4 up after five holes. But Seymour pulled even on the 10th. On the 16th and 17th holes, she earned ties by sinking eight-foot putts for par and bogey, respectively.

On the par-4 18th, Ledbetter drove her tee shot beneath some pine trees. She was able to hit her second shot only about 15 yards and reached the fringe with her third shot. Meanwhile, Seymour made the fringe in two and parred the hole to win it.