More from Chalkdust
On the cover: flexahedron
Connie Bambridge-Sutton invites you to make a flexible 3D shape
Christmas puzzle #1: Christmas tree sudoku
Puzzle #1 in our 2020 Christmas puzzle series
Here Come the Numbers
We review the fourth of this year's nominees for the Book of the Year
Christmas competition #3: ‘An eggnog mystery’
Lies, liquor and logical deduction play their part in this festive holiday tale
Maths trumps review
A mathematically-themed version of the classic card game, with several new features
Changing the status quo
Difficulties in designing a voting system for referenda