OrderInference

Make a little room for quiet reasoning. Fill each board by eliminating values that cannot fit, one careful move at a time. Choose a 6×6 or 9×9 puzzle, then work through Beginner, Advanced, and Expert chapters with 20 puzzles in each chapter. Every row, column, and outlined region follows the same no-repeat rule. A local daily challenge offers another board to solve without a network connection. Select a square to enter an answer or switch to candidate notes while you compare possibilities. Check the board for conflicts, undo or redo a move, and clear your entries only after confirmation. Up to three hints per game highlight a square and explain which candidates remain after checking its row, column, and region. Pause whenever you need to. Your unfinished board, notes, timer, and move history are saved on your device so you can return later. After a finish, review your time, hints, undos, chapter progress, personal times for each board size, finishes without hints, and local daily challenge streak. Use the guided 4×4 demo to practice row, column, and region elimination. Adjust the light or dark theme and choose how conflict marks, candidate notes, motion, and sound feedback appear. Puzzles and progress are available offline. There is no account or social leaderboard; your game records stay in local device storage and can be reset in Preferences.