More from Chalkdust

Easy to state, hard to prove: The Collatz conjecture
90 years later, we're still unable to prove this surprisingly simple statement
At Sixes and Sevens
We review the fourth of this year’s nominees for the Book of the Year
On the cover: cellular automata
Discover the meaning of the coloured squares on the cover of issue 13
Christmas puzzle #1: Christmas tree sudoku
Puzzle #1 in our 2020 Christmas puzzle series
Adopt a polyhedron
Mara Kortenkamp, Erin Henning and Anna Maria Hartkopf give us a tour of Polytopia, a home for peculiar polytopes
Puzzles about partitions
Tricks and puzzles that provide an introduction to the world of partitions
