Sudoku

Color Sort, Number & Letter Sort · Updated May 6, 2026

About Sudoku

The eye scans a Sudoku board like a radar sweeping for gaps. Each row, column, and 3×3 box presents a visual pattern of missing digits — a number band that needs completing. The player scans for cells where only one number fits, then taps to insert it. The grid fills incrementally, and the satisfaction comes from seeing the pattern tighten until every number locks into place.

There’s something so satisfying about placing the last number in a Sudoku grid and watching everything click into place. You get a clean 9×9 board, and your job is to fill every row, column, and 3×3 box with numbers 1 through 9—no repeats allowed. Pick a difficulty, tap a cell, and choose your number. Made a mistake? Just erase it. It works offline, saves your progress, and runs smooth on KaiOS phones. The challenge is real, but the payoff is pure puzzle bliss.

How to Play Sudoku

Select a difficulty level from the starting menu.
Tap an empty cell to select it.
Choose a number from the number bar to fill the selected cell.
Use the erase button to clear a wrongly placed number.
Fill all rows, columns, and 3×3 boxes with numbers 1–9 without repetition to complete the puzzle.

Game Features

Multiple difficulty levels adjust the starting number of filled cells, challenging beginners and experts alike.
The erase button allows easy correction of mistakes without restarting.
Clean 9×9 grid layout with clear visual separation of 3×3 subgrids.
Works offline with no internet connection required.
Progress is saved automatically, allowing players to resume puzzles later.

Tips & Strategies

Scan rows, columns, and boxes for pairs or triples of numbers to narrow down possible placements.
Start with cells that have the fewest possible numbers — these are easiest to solve first.
Use the erase function immediately if you place a number that conflicts with existing ones.