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Take a quiet break with number-logic puzzles designed for careful thinking at your own pace. Fill each board so every row, column, and box follows the rules.

Choose a compact 6×6 board or a classic 9×9 board. Explore three chapters with 20 locally generated, uniquely solvable puzzles in each chapter, or play a daily challenge selected on your device.

Use candidate notes to keep track of possibilities, check a board for row, column, or box conflicts, and undo or redo your moves. When you need help, use up to three hints per puzzle. Each hint explains a deduction and places the indicated number.

Your in-progress board, notes, timer, and move history are saved on your device. Return later to continue where you left off. After solving a board, review your time, hint use, undo count, and personal record. Chapter progress and daily completions stay with your local game history.

Adjust the light or dark theme, entry sound, motion, conflict marks, and matching-number highlights to suit your play. No account or connection is needed for puzzles and progress.