Play Prime Sudoku Online Free

About This Game

Prime Sudoku is sudoku stripped to its essentials: a grid, the numbers one through nine and your own logic. Every puzzle asks the same quiet question — can you fill all nine rows, columns and boxes without a single repeat? — and answers it with the satisfying click of a completed board. Difficulty options let you set the tone of a session, from a warming-up easy grid to a hard one that demands candidate notes and clean elimination. The presentation is deliberately simple, so it runs anywhere, loads instantly and never distracts. A dependable daily sudoku, free in your browser.

How to Play

Fill every row, column and 3x3 box with the digits 1-9, each appearing exactly once per unit. Select a cell and enter a number; change your mind by overwriting. Begin each puzzle with the densest unit — the row, column or box already holding the most digits — and place what must be true before guessing what might be. Difficulty settings adjust how many starter numbers you receive. Tip: when stuck, pick one digit and map everywhere it can legally go; singles reveal themselves on the map.