Sudoku GameCenter

A sudoku that never repeats itself. Every puzzle is generated when you start it, not pulled from a list. There is no stock to run out of — and every puzzle is guaranteed to have exactly one solution. Verified before you ever see it. FIVE TIERS THAT MEAN SOMETHING Difficulty here is not a random number. A solver plays each puzzle the way a person would and measures which techniques it genuinely demands, from a simple candidate to a forcing chain. What is labelled Expert really is expert. HINTS THAT EXPLAIN A hint does not just hand you a digit. It shows the next logical step and names the technique behind it, so next time you spot it yourself. EVERY DEVICE, EXACTLY WHERE YOU STOPPED Start on iPhone, continue on Mac, finish on iPad. Your game follows you through iCloud, notes and timer included. DAILY PUZZLE One puzzle a day, identical for every player worldwide, with its own leaderboard and double points. GAME CENTER Leaderboards for total points, best times per tier and the longest daily streak. 30 achievements, from your first solve to a perfect week. POINTS YOU CAN CHECK After every puzzle you see exactly how your score came about: base value, time bonus, deductions, streak bonus. Pencil notes are free — they are part of playing. ALSO • Candidate notes, fillable automatically on the Mac • Unlimited undo and redo • Wrong digits marked by shape as well as colour • Fully playable offline • VoiceOver and Dynamic Type • German, Italian, English • No ads, no in-app purchases, no accounts