A new puzzle every day

This is an article that I wrote for Chalkdust issue 23 , and thenew puzzle it introduces appears on the cover of issue 23. In January, I paid a visit to MathsWorld, the recently opened maths discovery centrein London, alongside some other members of the Chalkdust team.One of the highlights of the trip was playing the two-player game Genius Square. In Genius Square, you start with a six-by-six…