Sudoku is the world's best-loved logic puzzle. Originating from an 18th-century Swiss mathematician's work on Latin squares and popularised in Japan in the 1980s under the name "Sudoku" (数独, meaning "single number"), it became a global phenomenon in the mid-2000s and remains one of the most-played puzzle games in print and online.
Every puzzle here is generated fresh and mathematically guaranteed to have exactly one solution — no guessing required, just pure logical deduction.