Daily puzzlers would be quick to tell you that sudoku, Wordle’s mathematical cousin, is not as easy as it looks. The small grid, found often next to a word scramble or comic strip in a print ...

In a 2005 paper, computer scientist Bertram Felgenhauer and mathematician Frazer Jarvis set out to figure out how many possible valid, solved Sudoku puzzle grids, like the one above, exist.. As ...

The Miracle Sudoku adds challenging chess-themed restrictions to an almost empty grid. Even easy sudoku grids require deductive reasoning, but this one is an extreme brain teaser.

Named after the iconic Star Wars spaceship, the X-wing technique can help sudoku players narrow down the amount of possibilities for four squares on the grid. This in turn can help them figure out ...