Augusta veteran Fred Couples and American Jason Dufner share the halfway lead in the Masters on 5 under, as Rory McIlroy made his move through the field and Tiger Woods struggled in the second round.
McIlroy shot an impressive 3-under 69 to move to within a shot of leaders alongside Bubba Watson, Sergio Garcia, Lee Westwood and Louis Oosthuizen.
Couples showed the value of experience when playing at Augusta, shooting a 5-under 67 to move into a share of the lead with Dufner. The 52-year-old last won the Masters 20 years ago and his presence at the top of the leaderboard adds an extra level of interest to the weekend rounds.
"I feel like I know every inch of the course. I've played 28 years here and today was really a magical day," said Couples. "I'm going to be right there with everybody Saturday and Sunday, well, Saturday for sure."
Woods was struggling, especially of the tee, and did well to only be 3 over when the last putt dropped on 18. His frustration culminated on the 16th when he pushed his tee shot right, into a bunker, and threw his club on the floor before kicking it.
He started really well with two birdies in his first three holes, but lost his swing after that.
Spain's Garcia held a share of the lead until he bogeyed the 18th.
South African Oosthuizen had a tough start to his round, double-bogeying the second hole, but finished well with three birdies on his final five holes to shoot a level-par 72.
Overnight leader Westwood had parred his first 10 holes and produced two birdies on the back nine but undid a lot of his work on the final hole where he three-putted for a double bogey.
Defending champion Charl Schwartzel is eight shots behind the leaders after shooting a 3-over 75.
Nine former Masters champions and reigning British Open champion Darren Clarke were among those to miss the cut.
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