Alan Chippendale came down for the Buddy Worsham Memorial Junior Invitation golf tournament from Montreal and traveled almost as far around the Bethesda Country Club course yesterday in winning his first two matches.

Chippendale, asked how the course was following 39 holes of golf, replied, "Tiring."

Chippendale went the full 18 to defeat Army Navy's Robert Black, 1 up, in yesterday morning's first round. He then had to go 21 more holes for a victory over another Army Navy player, Pete Van Pelt, in the afternoon.

Both players bogeyed the 19th after Van Pelt's second shot flew over the green and Chippendale three-putted. The Canadian two-putted on the 20th to salvage par and stay even.

On the 21st, Van Pelt's second shot jumped over the green. He chipped up but then missed a 10-footer for par and finished with a 5 for the hole. Chippendale missed a 10-footer for a birdie but won the hole and match by sinking his two-footer coming back.

In the day's best match, Peter Harmon sank an 18-foot putt on the final hole for a 1-up victory over Doug Beechler in the first round. Harmon, a 10-year-old junior at American University who plays out of Woodlawn, had evened the match with a 50-foot putt on the 16th. The two then halved the 17th.

New Jersey resident Beechler had shot a 71 to win the medal in Tuesday's qualifying .

But Harmon's victory was short-lived as he dropped a second-round match to George Murphy of Belair, 7 and 6. Murphy has to struggle to qualify after he shot a 78 and survived a playoff with nine others for the final eight spots in match play.

Larry Rentz of Crofton, who lost in the 1977 Worsham final on the 19th hole to Joe Walter, breezed through his two matches. Rentz eliminated Chris Anderson of Wilmington, Del., 4 and 3, then defeated Casey Shine (72 in qualifying), 6 and 4.

Quarterfinals in the championship flight start today at 7:30 a.m. with semifinals following at 11:30. The final will be played Sunday at 1 p.m.