Home favourite Adam Constable carded a remarkable eight-under par course record of 62 but was still five shots behind runaway leader Stephen Dodd heading into the final day of the Ryder Cup Wales 2010 Welsh National PGA Championship at Cardiff Golf Club.
Steve Llewellyn's course record of 65, set in September 2005, looked in little danger of being broken at the start of the day, but Dodd and Constable had other ideas.
European tour pro Dodd had earlier broken the course record with a six-under 64 to move to four-under for the tournament, but he was overshadowed just a few hours later as 26-year-old local Constable produced a stunning round, which included eight birdies and an eagle at the 11th.
"I birdied the first which was a nice start and I just felt I needed to get as low as possible today to pull some shots back from yesterday," Constable said.
"I played very nicely on the front nine, and then eagled the 11th which was nice considering I shot a 10 there yesterday.
"My driving was good today, I didn't miss many fairways which is the key round here as is playing a few good approach shots."
Constable admits he was spurred on somewhat by Dodd's impressive round and knew at the 16th that he was in with a chance of breaking his recently-set record.
"On the 16th I hit probably my best iron shot of the day to within about six foot and the putt didn't even touch the hole.
"I thought that's probably it now. I hit it pretty much stone dead on 17 and then hit a nice shot onto the last.
"After the first round I set myself the target of posting two 65s and then that would hopefully get me inside the top 10, but it's a different story now and if I can get a few lower maybe I can chase Steve.
"Five shots is a big lead and especially with a man of his calibre so we'll just take each shot as it comes and see what happens."
Dodd started slowly and found himself two over after just three holes, but birdies on the fourth, sixth, seventh and eighth holes left him on two under for the front nine.
Another four birdies followed on the back nine as he broke the course record.
"The putting was a bit disappointing and I didn't get off to the best of starts being two over after three," Dodd said.
"I missed a lot of chances, but I pulled it back by hitting loads of nice shots.
"I drove it pretty straight and I hit the irons pretty close. I didn't put myself into too much trouble and pretty straightforward in the end.
"The plan for tomorrow will probably be the same as today - have a few practice swings in the shop and off we go, it worked today!"
"There's a long way to go, but I'm in a good position so I'll just try and do my best tomorrow."
Tuesday's joint leader Paul Collins (Marriott St. Pierre) shot a round of 71 to leave him on level par for the tournament along with Royal Porthcawl's Peter Evans, who carded a three-under round of 67.
James Lee from Caerphilly carded a sprightly two-under par round of 68, which included four twos, to leave him one over heading into the final day.
And he believes the key to his impressive round was his ability to bounce back from mistakes.
"You've just got to limit your mistakes," he explained.
"I hit it in the rough plenty of times but you just get out and take your punishment.
"I don't think I did a lot great - the biggest thing I'm pleased with was when I did make a mistake I didn't let it bother me.
"You've just got to crack on. You are going to make mistakes out there because you're slightly off line. My friend on the bag kept me positive and the great thing is that I haven't had a double bogey in the past two days which I think if you ask most competitors they have."
For scores click here.