Sudoku HTML Version

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Number Puzzle (Sudoku) Tool (Mobile Version)

Copyright 2026 SpaceSystem

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■ About This Software

This software is a tool for creating and solving Number Puzzle (Sudoku) problems, with automatic display of candidate numbers.

When creating a puzzle, you can select the difficulty (Easy, Normal, Hard, Very Hard) and solving techniques (Any, Naked Pair, Naked Triple, Hidden Pair, Pointing Pair, Box-Line Reduction, X-Wing, XY-Wing) to generate puzzles that match your level.

■ Startup Password

Password: Included in the downloaded file

■ System Requirements

Smartphone (iPhone, Android)

■ How to Use

Access the URL and enter the password.

Press the Create button.

Select the difficulty and solving techniques.

If needed, press the GET button to display candidate numbers.

All candidates will be displayed instantly.

Use the Memo button to switch between answer input and candidate input.

If you enter an incorrect number as an answer, it will be shown in red.

Use the ← key (to the right of the number keys at the bottom) to undo.

After completing the puzzle, press CLR to clear the board,

then create a new puzzle.

■ Button Descriptions

Create … Generates a puzzle based on the selected difficulty and techniques

GET … Calculates and displays candidate numbers

CLR … Clears the entire board

END … Exits the software

Memo … ON (right): Add/remove candidate numbers

                    OFF (left): Enter answer numbers

■ Notes

This software assists in creating Sudoku puzzles, displaying candidates, and solving them. It does not guarantee a unique solution. (Multiple solutions are not supported.)

There is no function to automatically generate and display the solution.

Redistribution, resale, and modification are prohibited.

■ Disclaimer

The author is not responsible for any damages resulting from the use of this software.

Please use it at your own risk.

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