Game ends when reaching this many errors (0 = no limit)
Maximum Allowed Hints
?
Game ends when reaching this many hints (0 = no limit)
Puzzle Generation
?
Error Reporting
?
Highlight Related Cells
?
Highlight Same Numbers
?
Show Candidates
?
Theme
?
Message Display Time
?
Animations
?
Sound Effects
?
Countdown Timer Sounds
?
Maximum Allowed Errors:
Sets the maximum number of errors allowed before the game ends. Set to 0 for unlimited errors.
Maximum Allowed Hints:
Sets the maximum number of hints allowed before the game ends. Set to 0 for unlimited hints.
Puzzle Generation:
Backtracking: Classic algorithm that guarantees a unique solution.
Pattern-Based: Faster generation using mathematical patterns.
Hybrid: Combines both methods for variety.
Difficulty:
Easy: 35-40 cells pre-filled
Medium: 41-50 cells pre-filled
Hard: 51-58 cells pre-filled
Random: Randomly selects a difficulty level
Theme:
Auto: Automatically matches your system theme
Light: Bright theme with dark text
Dark: Dark theme with light text
When enabled, highlights cells in the same row, column, and 3x3 box as the selected cell.
When enabled, highlights all cells containing the same number as the selected cell.
When enabled, shows possible numbers for each empty cell. Useful for advanced solving techniques.
When enabled, plays sound effects for game actions like placing numbers, errors, and hints.
When enabled, shows smooth animations for number placement and UI interactions.
Controls how long success and error messages are displayed before automatically hiding.
When OFF, errors are not highlighted. Use "Check Solution" to verify.
When enabled: beeping in the last 30 seconds before your best time, faster beeps in the last 10 seconds, and a sad sound if you exceed your best time.
Turn OFF if you find it distracting.
Stats
Clear Statistics
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Welcome to Cojoro Sudoku!
Sudoku is a logic-based number placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 subgrids contain all of the digits from 1 to 9.
Welcome to Cojoro Sudoku!
Sudoku is a logic-based number placement puzzle. Fill a 9×9 grid so that each row, column, and 3×3 subgrid contains all digits from 1 to 9. Choose a difficulty to start playing!