Hardsum

About the game

A number puzzle inspired by a property economists spotted in preference matrices: grids where every row and every column add up to the same total. Fill the grid so the sums match, with a new puzzle every day. Made by Adeniran Adedeji (@hardsumpuzzle). Gamavas links to the game on the maker's own site.

How to play

1. 1Open How to play for the rules of the day's grid.
2. 2Choose numbers so that every row and every column adds up to the same total.
3. 3Use Narrow Down if you're stuck; it removes some wrong options.
4. 4A new puzzle arrives every day.