Short for “Coronavirus Sudoku.” A sudoku that uses nine corona variants represented by the Greek characters (⍺, β, 𝛾, 𝛿, …) rather than numbers 1–9 to make it look devilishly harder to solve.
MathPlus Publishing is releasing “Coronadoku for Gifted Kids” before the Lunar New Year as a reminder of the initial number of people who died of the coronavirus in Wuhan, before the epidemic became a pandemic.
by MathPlus October 18, 2021