More from Chalkdust
- Venn diagrams, retrograde chess, and behind-the-scenes Christmas lectures all feature in our autumn 2021 edition. Plus all your favourite puzzles & columns.
- Puzzle #3 in our 2020 Christmas puzzle series
- Modelling unemployment using simple differential equations!
- The definitive chart of the best tools
- A crossnumber clue takes us plunging headfirst towards projective geometry
- It's the last day of the Chalkdust advent calendar, so there must be something very good behind today's door...