Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Lukas Müllner
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@ -45,9 +45,100 @@ Alternativen:
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- (141) One map. Nine lands. Every day. Build your realm piece by piece, chase three stars and climb today's
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leaderboard – right inside a Reddit post.
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### About the project (Markdown, LaTeX erlaubt)
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> Abschnitt „Inspiration“ bei Bedarf persönlicher machen (eigene Worte des Besitzers). Ob die KI-Unterstützung
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> erwähnt wird, entscheidet der Besitzer (die Regeln erlauben technische Hilfe, solange Ideen und Rechte beim
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> Teilnehmer liegen).
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```markdown
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## Inspiration
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Ninelands started as a strategy board game on a 9×9 board split into nine lands: you place a castle, farmers,
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knights and bishops, every piece claims land, and the goal is to rule the nine lands. It runs on the web, desktop,
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Android and itch.io – and its most popular mode has always been the **map of the day**, where everyone plays the same
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map and compares results.
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Reddit felt like the natural home for that mode. A daily map is a shared puzzle, and a shared puzzle wants a place to
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talk about it: _Where did you put your castle? How did you get 9/9 lands?_ So we built **Ninelands for Reddit** – a
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focused, bite-sized daily edition that lives inside a post, with the comment thread as the place to compare realms.
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## What it does
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- **One 9×9 map per day, the same for everyone.** A new post appears automatically every day.
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- **Easy to start, hard to master.** Tap to preview what a piece would claim and how much gold it brings; tap again to
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place it. The line below the board explains why a cell fits or not – no wall of rules.
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- **Three stars per map:** reach the gold target, rule the lands target, and both in one game. Targets come from
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computer games on that very map, so every day is fair.
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- **Leaderboard and streaks.** Only your first game counts. More stars first, then more gold, then the earlier
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submission.
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- **Your realm.** Unlock board themes with your streak and new banners and peoples (orcs, pirates) with your stars.
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- **Reddit-native.** Post your result to the comments with one tap, earn a 🔥 streak flair, and the best player of the
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day wears 👑 _Ruler of the day_ the next day.
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## How we built it
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- **Devvit Web** with plain TypeScript, bundled by esbuild; no UI framework. An inline start screen in the feed, the
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full board in expanded mode.
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- **The original engine, untouched.** The Ninelands engine is pure TypeScript (seeded RNG, `legalMoves`,
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`applyMove`, replay). A sync script copies it – plus the SVG board renderer – from a tagged release, so the Reddit
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edition plays exactly like the original and fixes flow in one direction only.
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- **A server that trusts nothing.** The client sends only its moves. The server replays them with the same engine and
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computes gold, lands and stars itself, so results cannot be faked.
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- **Redis leaderboards.** Each day is a sorted set. To rank by stars, then gold, then submission time in a single
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score, we use
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$$\text{score} = 100\,000 \cdot \text{stars} + \text{gold} + \frac{1}{\text{seq} + 1}$$
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where $\text{seq}$ is the running number of the submission. The fraction lies in $(0, \tfrac12]$, so it only breaks
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ties – and it makes every score unique, which turns a player's rank into a simple
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$\text{rank} = \text{count} - \text{zRank}$.
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- **First attempt only**, enforced atomically with `hSetNX` – two parallel submissions can never both count.
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- **Daily posts** via the Devvit scheduler, **Devvit Journeys** for analytics (journey starts when the castle is
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placed, a progress event per star, the end carries the gold as score).
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- **Privacy by design:** all user data expires 30 days after a player's last game.
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## Challenges we ran into
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- **Making the daily map unspoilable.** The website has a map of the day too – including a replay of the best game.
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The Reddit edition therefore uses its own seed, so its daily map can never be looked up elsewhere.
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- **Knowing when to stop.** In the original, a game ends when no move is left. On a phone that can drag on, especially
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under the law _One farm per land_, where only costly knights remain. We added an _End game_ button, and the game now
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detects when no remaining move earns gold and suggests ending.
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- **Fitting a strategy board into a post.** The board, the goals and nine piece costs have to be readable on a phone in
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portrait mode. Container queries keep the board as large as possible without pushing the hint line away.
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- **Platform details:** a template workflow our CI runner didn't understand, Redis commands that are not enabled for
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every app, `localStorage` that is cleared on every app update (so all choices live in Redis), and an analytics router
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that expects Express while our server has no framework – we rebuilt its five endpoints by hand.
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## What we learned
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- A daily game lives from **one shared moment**: same map, same day, one first attempt. Every feature we kept serves
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that moment; menus and settings did not make the cut.
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- Contextual hints beat tutorials. Showing _why_ a move doesn't fit teaches the rules faster than any rules screen.
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- Porting is easiest when the game logic is pure: the engine moved to a new platform without a single change.
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## What's next
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- Seasonal events beyond the winter festival, and more unlockable banners and boards.
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- A weekly challenge with a twist (fog of war, bandit camps) – both already exist in the original engine.
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- An optional duel against the computer after the daily map.
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```
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### Built with (Tags, max. 25)
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typescript, javascript, html5, css3, svg, node.js, devvit, devvit-web, reddit, reddit-api, redis, devvit-scheduler,
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devvit-journeys, esbuild, biome, playwright, ffmpeg, pixel-art
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### „Try it out“-Links
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- App: `https://developers.reddit.com/apps/ninelands-game`
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- Spielen: `https://www.reddit.com/r/Ninelands/` (sobald angelegt; bis dahin nicht eintragen)
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- Original-Spiel: `https://ninelands.stackteam.at`
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- Code: Repo ist privat – nur eintragen, wenn es öffentlich wird (optional)
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### Noch zu schreiben
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- **Ausführliche Beschreibung** (Funktionen und Ablauf) – Grundlage: `README.md`.
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- **Portierung angeben** (Kategorie „Best Ported Daily Game“): Ninelands gehört StackTeam; erklären, was seit dem
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11. Nov. neu entstanden ist (Pflicht für bestehende Projekte): neue Codebasis auf Devvit Web, neuer Tagesmodus mit
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eigenem Seed, serverseitig nachgespielte Bestenliste in Redis, Streak, Realm-Freischaltungen, Flair, Ergebnis als
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