Everyone starts somewhere. The rule of Sudoku is simple: fill the grid so every row, every column and every 3×3 box contains the numbers 1 to 9 exactly once. The skill is in finding the next square you can be sure about.
Start with Easy puzzles below. They can always be finished with just two techniques, Naked Singles and Hidden Singles, both explained on our Learn Sudoku pages.
Stuck? The Hint Assistant teaches instead of just giving answers. The first hint points to the area to look at, the second names the technique, the third highlights the exact squares and explains the logic in plain English, and only the fourth fills in the number. Hints used appear on your results card.
Play right in the browser with a big touch-friendly number pad or your keyboard. Turn on Notes to pencil in candidates, and they disappear automatically when you place a number. Undo, redo, an eraser, row/column/box highlighting, matching-number highlights, optional mistake checking and a pausable timer are all built in. Your progress saves on your device, so you can come back to an unfinished grid later.