SUDOKU puzzle

SUDOKU puzzle strips the format down to the essentials — pick a difficulty level, get a grid, and start filling it in. That difficulty picker is what separates this from a lot of other browser Sudoku games: easier boards leave more starting numbers on the grid so beginners have solid footholds, while harder ones ask you to hold several candidate numbers in your head at once before committing to a cell. Because there's no scoring pressure or countdown clock, it works equally well as a quick five-minute puzzle or a slower, more deliberate session. If you're after a free online Sudoku for beginners that still has real depth once you're ready for it, starting on an easier grid here and working up is a natural way to build that comfort before tackling tougher ones.