Sharon Briggs of Montgomery Village works for an engineering company. She told her bosses last Monday she expected to play "only for a couple of days" in the Womens's District Golf Association championship tournament at Argyle.

Briggs happily extended her leave yesterday by beating medalist Carol Davies of Washington 2 and 1, to enter the semifinal round.

In other matches, Ruth Meaders of Army Navy defeated Cathy Eyre of Reston, 5 and 4; Karen Jones of Argyle ousted Chris Lebiedz of Army Navy, 4 and 3 and Chris Epperly of Army Navy disposed of Carmen Olesner of Bretten Woods, 3 and 2.

In today's showdown, Briggs will face Meaders and Jones will play Epperly.

The Davies-Briggs match was a thriller all the way. Davies was one up at the turn, but Briggs began making putts on the back nine.

The Montgomery Village golfer evened the match with a par on the 10th. The 11th was halved and then Briggs went ahead with a birdie on the 12th. Davies again squared the match with a par in the 13th. Briggs parred the 14th to go 1 up and the 15th and 16th were halved. The match ended on the par 3 17th hole when Davies pulled her iron shot and bogeyed to Briggs' par.

Jones, 18, the youngest player still in contention, had a tough match before eliminating Legiedz, the 21-year old Universisty of Florida senior. The two were at the turn. Jones won the 10th and 12th to go 2 up. The 13th was halved before Jones put the match out of reach by winning the 14th and 15th. Lebiedz had problems with her driver all day. Jones was one over par for the 15 holes played.

Meaders, who has become a top contender in women's competition since coming to this area last year, had a 3 up lead over Eyre at the turn. Meaders played her normal steady game, with 10 pars, one birdie and three bogeys in the 14 holes the match lasted. Her birdie came on the eighth when she sank a 25-footer.

Epperly was 1 up after nine but Oelsner squared the match with a par at 10.

Epperly then won 11 and 12, lost the 13th but birdied the 14th to go 2 up. She won the 15th and 16th with pars to close out the match.