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Slitherlink puzzles that get properly hard. 75 levels across five chapters, a daily puzzle with a streak, three themes, and full offline play. Every puzzle has exactly one answer, reachable by logic alone — no guessing.
Draw one closed loop. Hand-checked Slitherlink puzzles that get properly hard.
One line. One closed loop. No guessing, ever. Pulli is Slitherlink — the Japanese logic puzzle also known as Loop the Loop, Fences, Loopy, Takegaki and Suriza. Every number tells you how many of that cell's four sides the loop runs along. From that alone, one single closed loop can be deduced. Not found by trial. Deduced. If you have finished every Sudoku you can stand and want something with real bite, this is the one to learn next. EVERY PUZZLE HAS EXACTLY ONE ANSWER Each of the 75 puzzles was built by a generator and then checked by a solver that proves the answer is unique and reachable by logic alone. Nothing here needs a guess. If you are stuck, there is always a next deduction waiting. FIVE CHAPTERS THAT ACTUALLY GET HARDER Pulli 6x6, Sikku 8x8, Neli 10x10, Kambi 12x12, Padi 15x15. The difficulty is graded by the reasoning a puzzle demands, not by how big the grid is. Later chapters need deduction chains, not patience. HINTS THAT TEACH INSTEAD OF SPOIL Three free hints a day. A hint moves you forward without handing you the board. A DAILY PUZZLE AND A STREAK A fresh board every day, the same one for everybody, with a streak to keep and a result you can share. DRAWN, NOT DECORATED Every line, number and icon is drawn by the game itself, inspired by kolam — the rice flour patterns drawn on doorsteps across South India, which are, like Slitherlink, a single continuous line around a grid of dots. Three themes: Rice, Indigo and Paper. BUILT FOR THUMBS Drag from dot to dot to draw. The line cannot go diagonal, so it cannot go wrong. Drag back over a line to rub it out. Mark the sides you have ruled out with crosses. Full undo. Left-handed controls. PLAYS ANYWHERE Works completely offline. No account, no sign-up, no login. Your progress is saved on your device. Made by one person in Mysuru, India.