Karrie Webb, ranked No. 1 in the world with wins at last month's U.S. Women's Open and LPGA Championship, carded a 3-under 69 for a share of third place with Nanci Bowen (68) and Denise Killeen (71). The trio will head into Sunday's final round three shots off the pace at 5-under 139.
Annika Sorenstam, who leads the LPGA Tour with five wins this season but hasn't titled since early May, posted 72 Saturday and finished the second round tied for sixth at 4-under par with Yu Ping Lin (69) and Dina Ammaccapane (71).
Sorenstam captured this title in 1995 and 1997-99 when the tournament was still held at Forest Hills Country Club.
Klein, who led by three strokes after opening with a 64, fashioned a see-saw round Saturday in which she answered birdies with bogeys through 12 holes. She made her fourth bogey of the day when she missed a four-foot par putt at the 14th, but evened her card with a two-putt for birdie at the par-5 16th.
'It was a much tougher day. Its always difficult to follow a great round with another great round,' Klein said. 'I hit the ball good, but where the pins were, I couldnt really go at a lot of them. I made a lot of mistakes out there today. It wasnt as good as yesterday, but I do feel like Im playing well.'
Klein, 27, is chasing her first victory since she claimed the PING Welch's Championship and the Women's British Open in back-to-back weeks in 1996.
Turner, whose last win came at the 1989 Hawaiian Ladies Open, recorded a pair of bogeys against one birdie through five holes. She added birdies at the ninth, 15th and 16th holes for a 2-under 70.
'Well, I putted well, but I wasnt striking the ball well and still scored well, so that was a positive,' she said. ' The pins were really tough today.
'Im just happy to be in the position to have a chance tomorrow.'
Killeen, who temporarily tied for the lead at 7-under, needed two chips to reach the green at the par-4 14th and two-putted from 10 feet for a double-bogey.
Canada's Lorie Kane, who made the Michelob Light Classic her breakthrough LPGA victory last year, stands five shots back with Nancy Scranton and Kris
Natascha Fink, Suzanne Strudwick, Marie-Josee Rouleau and LaRee Pearl Sugg earned spots in the Women's British Open based on their performances in the first two rounds this week.
Pamela Kerrigan and Shani Waugh, who, along with the four previously mentioned players, were not already exempt from qualifying for the Women's British Open, will square off for the fifth and final spot Sunday.
The Women's British Open will be held August 2-5 at Sunningdale Golf Club in England.
Full-field scores from the Ford Senior Players Championship