More from Chalkdust
Proof
We review the second of this year’s nominees for Book of the Year
Unlocking sudoku’s secrets
Sara Logsdon looks to graph theory and abstract algebra for help on the puzzle page
Book of the Year 2020
We announce the winner of this coveted prize
Top Ten: pictures of scorpions
The definitive chart of the best pictures of scorpions
How to make: a Möbius Surprise
Surprise yourself by making this thing
Christmas puzzles
Something for you to solve during the post-Christmas lull