A LITTLE LOGIC. A WORLD CONNECTED.
Connect the islands. Follow the numbers. Bring everything together.
BEGINNER · 01 OF 30
Your puzzle and timer are paused.
EVERY ISLAND BELONGS.
120 ORIGINAL PUZZLES
Progress stays in this browser. Back it up to move it to another device.
Catalog 1.0.0 · 30 puzzles at each difficulty. Settings apply immediately.
Choose one island, then a neighbor. Repeat the connection to cycle: no bridge → one → two → none. You can also drag from one island to another. Overfilled islands are marked with ! so you can revise them.
Tab enters the board. Arrow keys move to the nearest island in that direction. Enter or Space selects an endpoint; choose a second endpoint to cycle its bridges. Escape cancels selection. Ctrl/Cmd+Z undoes; Ctrl/Cmd+Shift+Z redoes. Use Tab to reach every toolbar.
Zoom and Fit board change the view. Pan board lets you drag the viewport without placing bridges; scrolling also works. Pause covers the board and stops the timer. Switching away pauses automatically.
Check progress tests current bridges as minimum commitments: a single bridge may still become double. It reports rule violations, contradictions, solvability, or completion. A blank connection means undecided. Hints use clue-based deductions and, on difficult positions, proof by contradiction. Revealing the answer is a separate action. Checks, hints, and reveals mark an attempt as assisted.
Beginner: small boards solved by island capacity. Easy: longer count chains or crossing exclusions. Medium: connectivity cuts and preventing closed groups. Hard: additional contradiction reasoning. Size alone does not set difficulty.
Daily selection uses your local date and catalog version, independent of progress. The fixed 120-puzzle rotation repeats every 120 days. Daily attempts are saved by date, separately from library attempts. Archive dates range from 2000 through 2099.