https://www.theguardian.com/lifeandstyle/2020/may/22/cracking-the-cryptic-puzzled-uk-men-become-internet-sensation-with-sudoku-channel

Lockdown turns mild-mannered mutterings from a Surrey loft into unlikely spectator sport

When Simon Anthony quit his lucrative but miserable job at a London investment bank to solve sudoku puzzles on YouTube, it looked like a bit of a leap. His early posts had done well to gain 100 views. Perhaps he had overestimated the demand for long videos of a 46-year-old man putting numbers in a grid from his spare room in Surrey.