Sudoku Master

About this game

Sudoku Master is a clean, paper-and-ink take on the classic number puzzle. Every board is generated the moment you press play, with a guaranteed unique solution and a difficulty graded by the logical technique it genuinely requires — from Naked Single all the way up to X-Wing. Pick Easy, Medium, Hard, Expert or Evil, or take the Daily Challenge that ramps from a gentle Monday to a brutal weekend, the same puzzle for everyone. Pencil-mark notes with automatic clean-up, three mistake-highlighting modes (including a purist off switch), and a hint button that names and explains the next logical step so you actually learn the techniques. Light paper, dark and sepia themes, full keyboard play, undo, auto-save and an optional three-mistake mode round it out. No download — solve instantly in your browser.