Sudoku Master: Killer & Logic

Sudoku that plays fair. Every puzzle is rated by a logical solver according to the techniques it actually needs, always has a single solution, and when you get stuck the hint explains not just what to place, but why. FIVE LEVELS GRADED BY TECHNIQUE • Easy: obvious and hidden singles • Medium: locked candidates • Hard: obvious pairs • Expert: hidden pairs, triples and X-Wing, still no guessing • Extreme: XY-Wing, Swordfish and beyond Difficulty comes from the logic you need, not from how many clues are removed. FIVE WAYS TO PLAY • Classic 9×9 Sudoku • Killer Sudoku: dashed cages whose digits add up to the number in the corner, with an interactive tutorial • Windoku: four extra shaded windows that must also hold 1–9 • 6×6 for a quick break, 12×12 for a bigger challenge Every mode has its own save slot and statistics, and the home screen picks up the mode you played last. HINTS THAT TEACH A hint names the next logical step (singles, locked candidates, pairs, triples, X-Wing, XY-Wing, Swordfish, and cage sums and the rule of 45 in Killer Sudoku), highlights the cells that justify it, and walks through any eliminations before the placement. Wrong entries are pointed out first, for free. DAILY CHALLENGE A new puzzle every day, the same for every player. Difficulty rises through the week, a monthly calendar tracks your progress, and finishing every day of a month earns a trophy. COMFORTABLE TO PLAY • One-tap auto notes, fully undoable • Number-first input: long-press a digit to lock it, then tap cells • Auto-removing notes, undo, pause and timer • Conflict, same-number and region highlighting • Dark mode and 15 languages • Works fully offline, no account needed STATS AND ACHIEVEMENTS Win rate, best time, streaks and best score for every mode and level, 24 achievements, and confetti when you finish. SUDOKU PREMIUM (AUTO-RENEWABLE SUBSCRIPTION) Every mode from Easy to Expert, plus every daily challenge, is free, and each Extreme level comes with one free game to try. Sudoku Premium unlocks Extreme in every mode, gives you unlimited hints in every game and removes ads. • Monthly subscription with a 7-day free trial for new subscribers; the price is shown in the app • Payment is charged to your Apple ID account at confirmation of purchase, or when the free trial ends • The subscription renews automatically unless it is turned off at least 24 hours before the end of the current period • Manage or cancel it in your App Store account settings Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.douzhuan.tech/privacy.html