If you haven't already, head on over to https://gp.worldpuzzle.org/content/sudoku-gp to take part in a round of Sudoku authored by our very own Sam Cappleman-Lynes. It's a great set of puzzles!
The instructions can be found here: https://gp.worldpuzzle.org/sites/defaul ... nd2_IB.pdf
The contest is live until 11pm GMT on Monday 3rd February - and to make sure you get your full 90 minutes, start before 9.30pm.