MASYU: Loop Logic Puzzle

White goes straight, black turns. Draw the one loop. MASYU (Masyu, the classic "pearl" loop puzzle) asks you to link every white and black pearl into a single loop that never crosses or branches. Every puzzle has exactly one answer, reachable by pure logic—no guessing. Climb the ranks as you solve, and make one daily puzzle a calm habit. ◆ Three promises • Free to start, no subscription • No third-party ads • Your records stay on your device ◆ How to play • White circle ○: the loop passes straight through and turns in the cell just before or after it • Black circle ●: the loop turns on the circle and goes straight through the next cell on both sides • Draw one closed loop that passes through every circle ◆ Features • Four difficulties graded by depth of reasoning: Easy 6×6, Medium 7×7, Hard 8×8, Expert 8×8 • Every puzzle has exactly one solution, verified by a solver • Daily puzzle that changes difficulty by weekday (Mon–Tue Easy, Wed–Thu Medium, Fri–Sat Hard, Sunday Expert)—the same puzzle for everyone, with no repeats until every board has appeared • Ranks: earn points with every solve and climb from 10 Kyu to 10 Dan • Continue: close the app mid-puzzle and pick up exactly where you left off • Simple controls: drag between dots to draw, retrace to erase • Hints when you're stuck • Stats: solves, average time, no-hint solves, daily streak • Board themes (loop colors) and a shareable image of your solved loop • Tables and buttons stay readable even at the largest text sizes • Quiet paper-and-indigo design with dark mode • For iPhone and iPad, in English and Japanese ◆ Great for you if • You've played plenty of number puzzles and want a new kind of logic puzzle • You enjoy pencil puzzles where you draw a single line or loop • You want a few focused minutes on a commute or break • You prefer puzzles solved by deduction, not trial and error • You're looking for a small daily brain-training habit ◆ Privacy • No account needed • Nothing you record is sent anywhere. Puzzles play fully offline • To show our other apps, the app reads public information from the App Store