Sudoku: Diamond

Flex your mind. Think beyond the square. Meet Sudoku from a fresh angle. Diamond's signature 30° board brings a different perspective to the classic 9×9 puzzle. Adjust the angle, return to a straight grid, or turn your device sideways for a spacious landscape board. The rules stay familiar. The view is yours. A BOARD THAT FITS YOU Choose Diamond or classic style and save separate portrait and landscape preferences. In landscape, controls move beside the board to give the puzzle more room. Hold a cell to inspect nearby numbers without changing your answer. FIND YOUR FLOW Double-tap an empty cell to open a nearby number pad. Add candidate notes, highlight related cells, undo a move, or pause whenever you need. Gentle tips on the actual interface introduce the gestures as you play. UNDERSTAND YOUR NEXT MOVE Ask for a hint that explains the logic rather than simply filling an answer. Explore Technique Academy for worked examples, from singles and pairs to more advanced patterns. A LITTLE CHALLENGE, EVERY DAY Take on the daily puzzle or choose from six difficulty levels, Very Easy to Master. Track your progress and achievements, or bring in another puzzle from text or a photo. PLAY AT YOUR PACE Play offline without creating an app account. Progress can sync privately through iCloud. Choose light or dark appearance and use larger text on iPhone and iPad. All puzzles, difficulty levels, hints, lessons and import tools are available in the free version. It may show portrait banners and an interstitial after a completed or ended game. One optional lifetime Premium purchase removes ads. No subscription.