Sudoku

About Sudoku

Sudoku is one of the world's most popular logic puzzles, appearing daily in newspapers, apps, and puzzle books globally. Despite using numbers, it requires zero arithmetic — the digits 1–9 are simply symbols. Each puzzle is freshly generated with a guaranteed unique solution.

This version features three difficulties, a pencil-note mode, 3-error limit, and personal best times saved locally per difficulty.

How to Play

• Click any empty cell to select it
• Type or click a number (1–9) to place it
• Each row, column, and 3×3 box must contain 1–9 with no repeats
• Blue numbers are given clues and cannot be changed
• Use Notes mode (✏) to mark candidate numbers in pencil
• Arrow keys navigate between cells; P toggles notes mode