数独 - シンプルな9x9ナンプレ

This is a simple 9x9 Sudoku (Number Place) app that can be played completely offline.
Its classic design without hints makes it ideal for those who want to solve the puzzles independently.
Banner-only ads allow for relaxed gameplay.

[Key Features]
- 3 difficulty levels (easy/normal/hard)
- Memo function (records candidate numbers)
- Highlights duplicate numbers
- Checks for duplicates within rows/columns/blocks
- Restart at any time with a new game

This classic Sudoku game is simple and easy to use, making it perfect for enjoying in your spare time.

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A simple 9x9 Sudoku app that you can play completely offline.
Designed in a classic no-hint style, it is perfect for players who want to solve puzzles by their own logic.
Only banner ads are used, so you can enjoy a calm and focused play experience.

[Features]
- 3 difficulty levels: Easy / Normal / Hard
- Memo function for note-taking
- Highlighting for matching numbers
- Duplicate checking in rows, columns, and blocks
- Restart anytime with a new game

Simple, clean, and easy to use, this is a classic Sudoku game for quick play or long puzzle sessions.