On the Number of Sudoku Grids

摘要

The subject of the number of sudoku grids has sparked much recent attention in Mathematics Today (R. Franklin (October 2012), Charles Evans (April2013) and Ian Stewart (June 2013)). This feature addresses known results for the numbers of sudoku grids of different sizes, and explains how a well-formed symmetry group can be used to simplify the enumeration of sudoku grids.