More from Chalkdust
Orbit crossnumber
Can you solve it?
On the cover: Regular tilings
Poppy Azmi explores the patterns that are all around us
Christmas puzzle #2: A Christmas nonogram
Puzzle #2 in our 2020 Christmas puzzle series
Surname extinction
Why do surnames die out? We take a look at the Galton-Watson process for modelling the extinction of surnames to answer the question: 'When will we all be Smiths?'
Linear algebra… with diagrams
Rediscover linear algebra by playing with circuit diagrams
Menace: the Machine Educable Noughts And Crosses Engine
Teaching a bunch of matchboxes how to play tic-tac-toe