Codebreaker Sudoku

Deep underground, in an ancient elder dungeon from a lost civilization, Captain Kaelen has kept watch over the mysterious encoded numbers for a hundred years. Can you solve the puzzle? CLASSIC SUDOKU, NOTHING ADDED Nine rows, nine columns, nine boxes. Each one holds 1 to 9 exactly once. FIVE LEVELS • Flash — an Easy puzzle with only 26 cells open. A game for a quick break. • Easy, Medium, Hard, Extreme — each one a band of solving techniques. NEVER A GUESS Every puzzle is rated by a technique solver and has exactly one solution. You never need to guess. If you are stuck, there is a step of logic you have not found yet. HINTS THAT TEACH Stuck? A hint shows you where to look and why, then marks the cells. It gives you the answer only if you ask. TOOLS THAT STAY OUT OF THE WAY • Pencil marks that clear themselves when you ink that numeral in the same row, column or box. • Undo, always…