Yani Tseng certainly is consistent.

The 21-year-old from Taiwan shot her second consecutive 4-under 68 yesterday, taking a four-shot lead after the second round of the Women's British Open. The American duo of Brittany Lincicome and Christie Kerr joined Amy Young of South Korea in the chase entering the weekend, in Southport, England.

Rain washed over Royal Birkdale in the afternoon, making things difficult for the late starters - including defending champion Catriona Matthew of Scotland, who missed the cut by seven strokes after making a 10 at the par-four 13th hole.

Kerr posted the low round for the tournament with a 5-under 67. She made a pair of 10-footers for birdie on the first two holes, dropped a stroke at the eighth, then picked up four more birdies to join Lincicome and Young at 4 under.

Julie Inkster also shot herself into contention with a 2-under 70 that left her five shots off the lead, doing so in the worst of the weather.

Tseng, who has already won the LPGA Championship and Kraft Nabisco Championship in her brief professional career, made five birdies yesterday and dropped her only shot on the 373-yard par-4 third, when she drove into the bunker on the left side of the fairway and failed to reach the green in regulation for the first time in 21 holes.

In other tournaments:

* Ross Fisher will take a three-shot lead into the third round of the Irish Open, in Killarney, Ireland, after shooting a 10-under 61.

* Bernhard Langer overcame a shaky front nine with an eagle and birdie on the back nine to take the clubhouse lead at 3 under in the second round of the U.S. Senior Open, at Sammamish, Wash.