Sudoku by BlueMoon

Play fresh Sudoku puzzles directly in ChatGPT. Choose a level and start solving instantly with the on-screen number pad or your keyboard.

Every puzzle is freshly generated with exactly one solution. Five carefully graded difficulty levels welcome every kind of solver: Easy builds confidence, Medium develops technique, Hard raises the challenge, Expert rewards experienced players, and Master offers the deepest test. Each level is measured by the solving logic the puzzle actually requires.

Designed for smooth, satisfying play:
• Instant feedback makes every entry easy to review.
• Pencil marks, erase, and unlimited undo keep every move flexible.
• Logic-based hints guide your next step and help you learn.
• A timer, progress bar, and live remaining-number counts keep you in flow.
• Tap any number to highlight every matching cell on the board.

Choose the classic 9x9 Sudoku, a quick 4x4 or 6x6 puzzle, or the ultimate 16x16 Hexadoku with symbols 1-9 and A-G.

Enjoy a quick mental break, daily brain training, or a serious solving challenge whenever you want. Available in twelve languages.