Scott Hend carded a superb 63 to surge into the lead of the European Masters at the halfway stage, while Darren Fichardt matched his score for the round to sit one stroke adrift.
The Australian suffered heartbreak as he lost in a play-off with Alex Noren in Crans Montana last year, but he is brilliantly placed to make up for that disappointment this time around.
Hend held a share of the overnight lead with Miguel Angel Jimenez and Tyrrell Hatton but, while he went from strength to strength, Jimenez and Hatton both faltered.
Jimenez dropped back to three-under-par with a three-over 73, while a 71 for Hatton saw him fall to five under.
Hend, though, gained seven strokes in a flawless round to lead Fichardt - who also carded a 63 - by one stroke.
A magnificent tee shot to three feet helped Hend to an eagle at the seventh, before he made the turn in 32 after a birdie at the ninth. He then finished in spectacular fashion with four birdies in the final five holes.
Hend's performance came despite the significant distraction of having his children home in Florida, where Hurricane Irma is set to land.
The 44-year-old, whose wife is serving as his caddie in Switzerland, said: "We're a bit worried about the kids in Florida with the sitter at the moment.
"We've been up late at night trying to find out contingency plans. I think they're going to get out of there. It's not worth the risk."
Fichardt matched Hend's round with five birdies and an eagle, which came at the 15th, as the South African followed up his opening round 65 in style.
Thongchai Jaidee, Fabrizio Zanotti and Todd Sinnott are all four strokes back on nine under, with Matthew Fitzpatrick five off the pace along with Julian Suri and Ryan Fox.
Defending champion Noren improved on his level-par round one with a three-under 67 but still has plenty of ground to make up to have any hope of retaining the title.
Lee Westwood, making his 500th European Tour appearance, made the cut thanks to three birdies in the final five holes having been one over after 12.
World number 16 Tommy Fleetwood did not make the cut, however, his level-par round not enough, the Englishman having carded a 72 a day earlier.
23 de marzo 2018
|Neuer cautious over comeback date despite taking positive steps|
|Lehmann slams ´disgraceful´ Newlands abuse|
|Di Maria predicts ´big change´ at PSG after Champions League failure|
|Everton defender Holgate warned for alleged homophobic tweets|
|Russia 0 Brazil 3: Coutinho on target in routine win|
|Icardi must keep performing to earn Argentina recall, says Zanetti|
|Different place, same Zlatan - Ibrahimovic determined to maintain winning DNA with LA Galaxy|
|Injured Cavendish out of Commonwealth Games|
|Experience the key for Juventus in title race, insists Trezeguet|
|Stanikzai plays through the pain to guide Afghanistan to glory|
|Lyon and Paine frustrate Proteas after Morkel joins 300 club|
|Messi lacks Maradona´s charisma, claims Batistuta|
|Usain Bolt claims he´ll return to Dortmund|
|Trezeguet confident Pogba will shine at the World Cup|
|Ibrahimovic departs Europe with remarkable haul of league titles|
|´Very, very happy´ Lanzini loves West Ham amid transfer talk|
|LA Galaxy confirm Ibrahimovic arrival|
|Pressure off soaring Falcons, says Flood|
|Afghanistan edge out Ireland to secure World Cup spot|
|Age no barrier to Messi brilliance - Kluivert|
|Japan 1 Mali 1: Late Nakajima strike earns a draw|
|Record-breaking Stockdale named Six Nations´ top player|
|Warner in verbal altercation with fan following dismissal|
|Uruguay 2 Czech Republic 0: Suarez scores 50th international goal|
|I choose the Galaxy! - Ibrahimovic confirms LA switch|
|Retiring Morkel joins the 300 club|
|Parker accuses Joshua of disrespect towards NZ media|
|Roberto Carlos declares Neymar and Brazil the World Cup favourites|
|Kluivert tells son Justin to snub Manchester United for Barcelona|
|It´s hard to swing it when it´s not round - Anderson unhappy with pink ball|
|Reading appoint former Swansea boss Clement|
|I had to get out of my comfort zone - Goretzka explains Bayern switch|
|Isaako kicks Broncos to golden-point win over Tigers|
|Adelaide United 5 Newcastle Jets 2: Five-star Reds end winless streak|
|Crusaders back to winning ways as Rebels rout Sharks|
|Goals, nutmegs and cheers - Usain Bolt impresses in Borussia Dortmund training|
|Ricciardo given three-place grid penalty|
|Williamson frustrated not to kick on after record-breaking century|
|De Bruyne: Don´t compare me to Messi and Ronaldo|
|Raza apologises for Zimbabwe´s World Cup woe|
|Real Madrid can win the Champions League, Roberto Carlos claims|
|Martinez determined to earn World Cup place|
|Horner and Arrivabene clash over Ferrari´s recruitment from FIA|
|Williamson notches record ton but rain frustrates New Zealand|
|Arthur ´counting the days´ to Barcelona switch|
|English football must address racism, says Southgate|
|Alisson can be world´s best – Taffarel|
|Rockets need OT to beat Pistons, Hornets record sixth biggest win|
|Hamilton contract to be finalised ´soon´, says Wolff|
|Warriors star Curry ´definitely´ wants ownership stake in Panthers|
|Kings´ Kopitar tallies first four-goal game|
|Ter Stegen dismisses ´Messi with gloves´ label|
|Medvedev fumes after win, Shapovalov battles through|
|Buffon: Messi more complete than Ronaldo|
|Neymar is irreplaceable, says Tite|
|Halep joined by Pliskova and Kerber on mixed day for seeds in Miami|
|Rahm joins Johnson in early elimination, McIlroy hits back|
|Red Wings´ Green to undergo cervical spine surgery|
|Conti: Milan much better thanks to Gattuso|
|Show must go on in Hollywood! - Pogba and Mkhitaryan say Ibrahimovic goodbyes|
|Arthur: I´ll find out if Messi is from this planet|
|Barcelona better than Real Madrid even if Neymar signs - Iniesta|
|I haven´t booked a holiday yet - Leno hoping for World Cup call|
|I may be 40 but I´m still Juve´s number one – Buffon bullish over Italy return|
22 de marzo 2018
|Italy coach Di Biagio dismisses Raiola rage over Balotelli snub|
|Lopetegui not ruling out Martinez World Cup chances|
|Late Widnes rally sees off Salford|
|Ailing Halep battles past Dodin in Miami|
|Spain defender Ramos targeting Casillas caps record|
|Pogba gets no special treatment from Deschamps|