TWO years ago a 27-year-old American with a PhD in chemistry set the Guinness World Record for the fastest completion of a sudoku puzzle. His time was two minutes and 8 seconds.
Last week Lucus Yeo, an 11-year-old boy from Castle Hill with a passion for formula one racing, smashed that record.
Isn't that marvellous?
How can you not love stuff like this. Years ago I wanted to be a numbers nerd, but just lacked the commitment and talent. But how wonderful to see others at the top of the game.
"To do it effectively he has to hold those 81 spaces in his head simultaneously," said Mr Mullan.