Plumbline by Solvyne

Draw a line from each coloured pipe to its matching pair — but here's the catch:
you must fill every square on the board, and no two pipes may ever cross. Simple
to learn, wonderfully tricky to master.

★ PURE, RELAXING PUZZLES
• Connect every matching pair of endpoints
• Fill the entire grid — no square left empty
• Pipes can never overlap or cross
• Every puzzle has exactly one solution — no guessing, always fair

★ PLENTY TO SOLVE
• Multiple levels, from gentle 5×5 warm-ups to tangled 8×8 brain-benders
• Quick Play — tap for a fresh, always-solvable board any time you like
• A fresh Daily Challenge every day — the same puzzle for everyone
• More levels added over time, free

★ TRACK YOUR PROGRESS
• Global leaderboards and per-level bests
• Achievements to unlock as you improve
• Cloud save — sign in and your progress follows you

★ MADE FOR UNWINDING
• Play offline, anywhere — no timers, no pressure
• Clean, colourful board and a satisfying flow
• A quick puzzle for a spare minute, or a long session to relax

Free to play, with an optional one-time upgrade to remove ads.