More from Chalkdust
Solutions to recent puzzles
Looking back at puzzles about complex numbers, tic-tac-toe, and the Eggnog Mystery
Mathematics and art: the ELHP
Adam Atkinson uses maths to try to help a sculptor
Complex numbers and algebra
Exploring the beauty of complex numbers, their origins and why they are important
Chalkdust’s Christmas conundrums
As the festive season strikes again, we'll be dishing out more fiendish puzzles – this time with prizes!
Hedy Lamarr: Hollywood star and secret inventor
James Grime gets intimate with 'the most beautiful woman in the world' from the golden age of Hollywood
Puzzles on square grids
How to make Sudoku more interesting