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About this game

Make room for a little quiet thinking. Solve number puzzles at your own pace, with no countdown and no connection required.

Choose a 6×6 or 9×9 board and work through three chapters of 20 puzzles each. A guided 4×4 practice introduces row, column, and region deductions one step at a time. The daily challenge is selected consistently from the local date and can be played offline.

Tap a cell to enter an answer or switch to candidate mode to keep pencil notes. Starting clues stay protected. Conflicting entries are marked with both color and a symbol, and the check action tells you whether the board follows its row, column, and region rules without revealing the solution.

Undo or redo a move, clear a board after confirmation, or request one of up to three hints. Each available hint explains a verifiable deduction. Your unfinished board, notes, timer, and move history are saved on this device so you can return when ready.

After solving, review your time, undo actions, hints used, and personal best. Local statistics track completed puzzles, clean solves, progress across both board sizes, and daily challenge streaks. Choose a light or dark theme and adjust sound, motion, conflict highlighting, and candidate assistance.

Your puzzles and records stay on your device. No account, cloud sync, leaderboard, advertising, or social features are part of the game.