Nine Lights — A Harbour Logic Miniature

Place heights 1–9 once each. Taller towers hide smaller ones; the shore numbers tell you the sum of the heights you can see. Restore the harbour using deduction, with optional step-by-step hints and no timer.

Play three free, original boards. Use your keyboard or tap a square and a height. Print from your browser if you prefer pencil and paper. New boards reuse the rules and pieces; solving the same board again is not a new challenge.

This is an AI-assisted concept prototype: code, boards and copy were created with AI assistance and checked with exhaustive solution tests and a separate AI reviewer. It has not yet been tested by human players. Its visibility rule belongs to the established skyscraper-puzzle family.

We are considering a €9 total-price pack of 12 additional boards, with an offline browser version, printable pages and step-by-step hints. That pack is not available to buy. No money, email address or commitment is requested.

If you already have an itch.io account and want to help, leave one optional public comment: Where did you find this page? Which watch did you finish, if any? Did you use hints? Would you buy the described 12-board pack for €9 total: YES, NO, or UNSURE — and why? Feedback on confusing rules or controls is equally welcome. Please do not post personal details. Comments are public and handled by itch.io. You do not need to create an account or comment to play.