Sudoku Mission: Number Game

Sudoku that respects your time and your intelligence. Buy it once, play forever - no adverts, no in-app purchases, no account, and no internet connection required. FIVE TIERS THAT MEAN SOMETHING Easy through Evil are not guesses. Every puzzle is solved by an engine that uses real human techniques - naked and hidden singles, locked candidates, pairs and triples, X-Wing, XY-Wing, Swordfish - and graded by what it actually takes a person to see. A short puzzle hinging on one X-Wing is not "easy" just because it is short. A DAILY CHALLENGE EVERYONE SHARES One board a day, identical for every player, ramping from Monday Easy to Sunday Evil. Build a streak, collect medals on the calendar, and compare your time against par. HINTS THAT TEACH Stuck? A hint explains the deduction - "R4C7 is the only cell in box 6 that can hold 8" - instead of just filling in the answer. You finish the puzzle…