Observed arrival · 2026-11-09
Number Islands: Sudoku with coastlines
A logic-puzzle game asks you to draw six islands on a 6×6 grid, then place the numbers 1 through 6 so they appear once in every row, column, and island.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- People who enjoy logic puzzles and Sudoku-like number grids
- Worth noticing
- The page says every puzzle was verified three ways to ensure one answer solvable by reasoning alone.
Field notes
The browser tutorial walks through four small boards and supports both touch-style interaction and keyboard input. The site describes 77 chapters spanning four difficulty groups, with a daily puzzle, stars, and fourteen badges; those are presented as game features, while the mobile apps remain marked as coming soon. Strategy and history articles provide additional context for the puzzle’s rules and inspirations.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
✦PrettyNotable craft visible
●ProPolished or operationally mature
◎NicheUnusually specific use
One card from the complete issue