Second round leaderboard (par=72):
-11 E Molinari (It), R Jacquelin (Fr), MA Jimenez (Sp), P Hanson (Swe) -10 J Kingston (SA), S Gallacher (Sco), D Clarke (NI), P Casey (Eng) -9 F Molinari (It), J Edfors (Swe) -8 A Hansen (Den), G Storm (Eng), R Gonzalez (Arg), S Garcia (Sp) A Qurios (Sp), R Karlsson (Swe), S Webster (Eng)
Selected others: -5 P Harrington (Ire) -3 I Poulter (Eng), T Hamilton (US), C Montgomerie (Sco)
Missed cut:-1 JM Olazabal (Sp), M Campbell (NZ)
Jimenez negotiated the treacherous greens better with his lob wedge
Miguel Angel Jimenez overcame a broken putter to post a 65 for a halfway total of 11 under and a share of the lead at the Golf Champions event in Bahrain.
The 47-year-old snapped his putter in anger on the 13th but soon rolled in three successive birdies using a wedge.
A group of four at 11 under lead by one from another group of four featuring Paul Casey who shot a second 67, with Sergio Garcia two shots further back.
Ryder Cup captain Jose Maria Olazabal missed the cut by one at one under.
Ian Poulter carded a 69 which took him to safety at three under but he was fiercely critical of the dramatically sloping greens designed by Colin Montgomerie.
"Schoolboy error playing," he fumed on Twitter. "Apparently the architect wanted to make a statement with the greens. He did that all right. Simply the worst greens I have ever seen and I'm not joking. They are embarrassing."
Jimenez had been similarly exasperated after missing a number of putts, and hurled his flat stick at his golf bag after recording a par at the 13th hole at the Royal Golf Club course.
The unfortunate putter broke on impact and under the rules he was not allowed to replace it.
He had taken 22 putts up to that point but - using a lob wedge - proceeded to take only seven more on the final five holes.
Olazabal found some unusual spots on the course in his round of 73
Peter Hanson eagled the ninth and birdied four holes in succession from the 11th to join him at the top with Edoardo Molinari and Raphael Jacquelin.
Molinari birdied the first six holes and closed with another for a 65, and victory for the Ryder Cup player could take him above his brother Francesco, who is currently ranked 15th and only two shots behind in this event.
Scotsman Stephen Gallacher began at the 10th and recorded five consecutive birdies, collecting another four during his back nine for the day's best round of 64, which earned him both a share of the course record and second place.
First round leader Johan Edfors, who posted a 64 on day one, could only manage a 71 after a double bogey at the 15th but shares ninth at nine-under.
"One under was not a good score on this golf course and it's just that I didn't hit my driver all that well," he said. "That hurt me a lot and I also didn't putt that well. But I am still in good shape."
Casey would have joined the leading group but for a blemish at the 17th when he did well to drop only one shot by chipping in after he had driven into the water.
Garcia reached nine under but double bogeyed the 15th after hitting his approach into the lake, then dropped another shot at the next hole, before finishing with two birdies for an eventful round of 69.
In an unusual move, the cut survivors are joined for Saturday's third round by amateurs, prompting Poulter to tweet: "Should be lots of fun."