Jayden McNeill used to be able to solve a Rubik's cube with his feet. Now he can do it blindfolded.
The Canberra teenager will put his unique skills to the test at a national cubing competition in the capital this weekend.
While feted as an accomplishment only attainable by mathematical geniuses, McNeill reckons anyone can "train their brain" to solve the Rubik's cube quickly.
"To be honest, memorising and solving a Rubik's cube blindfolded isn't too difficult. To memorise, it's maybe ... two phone numbers worth of information on the fly and then you kind of execute that really quickly," he said. "Anyone that gives it enough time can learn to solve one."
Able to finish the cube in as little as 5.91 seconds, McNeill taught himself how to solve the puzzle through online guides when he was 14.
Now 18, he recently returned to Canberra after competing abroad in international speed cubing contests, where his mum Lynette Svanosio said he was really put through his paces.
"My son in one of the comps he did overseas had to memorise 13 cubes, pull the blindfold down and solve the 13 in one go. He got 13 out of 13," she said.
Solving 13 Rubik's cubes in a row while blindfolded might seem impossible, but McNeill said it came down to "practice, practice, practice".
"The way it works is when you do your official solve, the time it takes to both memorise the cube and solve the cube without looking is taken into account," he said.
"My best in competition is 27 seconds.
"The secret is just practice, you've got to put in the time, make sure you learn all the necessary skills it takes to get faster and just keep at it."
More than 60 competitors will descend on Canberra for the two-day tournament this weekend, from as far afield as China and India.
Among the challenges to be presented to McNeill and the other contenders will be Rubik's cubes with 12 sides.
He will also attempt to solve the geometric puzzle one-handed and try to finish 15 cubes blindfolded in one hour.
His mum said there is a small, tight-knit community of speedcubers in Canberra who are willing to share their skills.
"Even though it's a competition they're competing against themselves. It's all about beating your personal best," she said.
The Canberra Spring 2016 speedcubing competition is on September 24-25 at Lanyon Vikings Club from 9am to 6pm.