Nurikabe vs Slitherlink

Nurikabe is a logic puzzle about splitting a grid into islands and sea. Each number marks an island made of exactly that many cells. Islands never touch, all the water joins into one connected sea, and no 2x2 block of sea is allowed. Every puzzle has one solution and can be solved by logic alone, so there's never any guessing. Features: • One-tap controls: tap a cell to flood it with sea, tap again to mark land, tap a third time to clear • Numbered clues tell you exactly how big each island must be • Smart highlighting flags water that breaks the rules • Cells lock in as the grid resolves toward its solution • Three sizes to grow into: 6x6 Easy, 8x8 Medium, 10x10 Hard • Undo any move with a single tap • Progress saves automatically, so you can stop and pick up later • Stats and best times for every difficulty • Plays fully offline Quiet, clever, and deeply satisfying. If you like Sudoku, Nonograms, or Hashi, Nurikabe could be your next obsession.

Slitherlink, the classic logic puzzle — drawn like pen on paper. The rules are simple. Each number counts the lines surrounding its cell. Satisfy every number while drawing one single closed loop — no branches, no crossings — and the puzzle is complete. It looks easy, and then the logic gets delicious. Every puzzle has exactly one solution. Guessing is never required: every generated puzzle is mathematically verified to have a unique answer. Difficulty names mean something here, too — we measure the depth of reasoning each puzzle actually needs, and only serve ones that earn their label. ■ Features • New to Slitherlink? A hands-on tutorial teaches the rules on a tiny practice board • Four difficulties — from Easy 5×5 to Expert 12×12 • Daily Puzzle — the same board for everyone each day, with an attendance calendar and streaks • Paper-quiet design — an ink-and-paper ledger look, in light and dark • Comfortable controls — tap to draw, long-press to mark ×, drag along the dots • Room for big boards — pinch to zoom, two-finger pan, iPad and Apple Pencil support • Mistake-proof — unlimited undo/redo and automatic saving • Track your progress — best and average times per difficulty For the moments you want quiet focus, one board of Slitherlink is enough.