Normal sudoku rules apply, and numbers increase along thermometers from the bulb to the end. Identical digits cannot be a chess king's move apart and the central 3x3 box is a magic square (each row, column and 3-cell diagonal adds to the same total)
Normal sudoku rules apply, and numbers increase along thermometers from the bulb to the end. Identical digits cannot be a chess king's move apart and the central 3x3 box is a magic square (each row, column and 3-cell diagonal adds to the same total)