1. Sudoku is played on a 9x9 grid where you fill in numbers 1-9
2. Each row, column and 3x3 subgrid must contain all digits from 1 to 9 without repetition
3. Gray cells are fixed numbers that cannot be changed
4. Click an empty cell then select a number from the bottom panel
5. Click "Check" to verify your current solution
6. Click "Hint" to reveal one correct number
7. 59 Games - Fast & Smooth, Perfect Companion for Work Breaks!