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Moat or Bloat

4D Chess

Play chess in 4 dimensions

Web app Rated 7 Oct 2026

Link
4dchess.lol
Built by
will to code

Bloat

182/500

Where it landed on the scale

Bloat
0
Float
300
Moat
400

Summary

A well-built, playable 4D chess web game with a rules tutorial, AI difficulty levels, and online play on its own domain. It's a hobby/showcase project with no revenue model and little that would stop a copy, so the score reflects solid execution but low commercial viability.

Bloat · Not much here works or looks likely to last, yet.

Breakdown

Five measures, 100 points each. Open the receipts under any of them to see the posts and pages behind the points.

Viability

Is there a real problem, someone who would pay, and a market this builder can actually reach?

It's a fun puzzle-game novelty with no payment path, no pricing, and no sign of a local market or a reason for anyone to pay.

15/100

Rubric 0–20No clear problem or user. A toy, a practice clone, or a solution looking for a problem.

Receipts (2)

  1. The live site has no payments, pricing, or accounts beyond guest sessions.

    Checked 7 Oct 2026 · 4dchess.lol (opens in a new tab)

  2. The pitch is 'checkmate your friends in 4d', which is entertainment with no stated business model.

    “somehow finished this at the same time feeling pretty good right now 😊 go checkmate your friends in 4d https://4dchess.lol”

    Post · @willtocode · 7 Sept 2026 · open on Telegram (opens in a new tab)

Moat

What stops someone copying it?

The edge is mostly the execution of the 4D rules, tesseract view, and AI. The source is MIT-licensed, so anyone could fork it, and there's no data, network effect, or local depth.

22/100

Rubric 21–40The only edge is execution, or being first.

Receipts (2)

  1. The terms say the source code is available under the MIT license.

    Checked 7 Oct 2026 · 4dchess.lol/terms (opens in a new tab)

  2. The rules and tesseract projection are carefully built, but they are reproducible effort rather than a defensible asset.

    Checked 7 Oct 2026 · 4d-chess.pages.dev (opens in a new tab)

Momentum

Did the updates keep coming?

It was shipped across about 13 days in September 2026, with the last sign of activity on September 17. That's a short burst with no ongoing cadence yet.

0/100

  • Sustained shipping0/60

    Worked on across 13 days.

  • Consistency0/40

    Updates in 1 of 1 month.

Receipts (2)

  1. Earliest post about it.

    “4d chess Made by Astra”

    Post · @willtocode · 5 Sept 2026 · open on Telegram (opens in a new tab)

  2. Most recent post about it.

    “yoooooo open ai posted my 4d chess demo 🫠”

    Post · @willtocode · 18 Sept 2026 · open on Telegram (opens in a new tab)

Infrastructure

Does a real, working product exist?

A full working product exists: the 4D rules engine, AI opponents, a tutorial, and online multiplayer with guest sessions, chat, and a Convex backend.

94/100

  • It's live20/20

    https://4dchess.lol responded when checked.

  • HTTPS5/5

    Served over HTTPS.

  • Real product35/35

    A full working game: 4D rules for all six pieces, computer opponents at four difficulties, undo, move history, a tutorial, and online play with matchmaking and chat.

  • Own home10/10

    Lives on its own domain (4dchess.lol).

  • Maintained15/15

    Last sign of shipping 2026-09-17.

  • Operations9/15

    There's a real backend (Convex) with guest sessions, rate limiting, and abuse prevention, plus Cloudflare hosting, a privacy policy, and terms. It has no docs, API, status page, or second platform.

Receipts (5)

  1. https://4dchess.lol responded when checked.

    Checked 7 Oct 2026 · 4dchess.lol (opens in a new tab)

  2. The archived build has computer play with difficulty levels, two-player mode, a tesseract view, and a thorough how-to-play guide.

    Checked 7 Oct 2026 · 4d-chess.pages.dev (opens in a new tab)

  3. The privacy policy describes online games, matchmaking, invitations, chat, and reconnection.

    Checked 7 Oct 2026 · 4dchess.lol/privacy (opens in a new tab)

  4. Describes Convex backend, guest authentication, IP-based rate limiting, and error logs.

    Checked 7 Oct 2026 · 4dchess.lol/privacy (opens in a new tab)

  5. Terms of service and a support email address are present.

    Checked 7 Oct 2026 · 4dchess.lol/terms (opens in a new tab)

Sustainability

Is it being set up to last?

It's on its own domain with privacy and terms pages, but there's no revenue, no pricing, and no team or roadmap. It's easy to fork under the MIT license, so long-term upkeep depends on the maker's interest.

51/100

  • Distribution25/30

    A web app on its own domain.

  • Payments0/15

    No payment provider found.

  • Pricing0/10

    No pricing found on the site.

  • Revenue0/5

    Nothing in the posts or site shows paying customers or any revenue.

  • Privacy policy7/7

    Has a privacy policy.

  • Terms5/5

    Has terms of service.

  • Support8/8

    Posts point users to a support channel.

  • Commitment6/20

    The builder moved play to a dedicated domain and kept the archived version pointing to it. The policies were updated within a couple of weeks. There's no sign of a team, roadmap, funding, or dedicated community.

Receipts (5)

  1. A web app on its own domain.

    Checked 7 Oct 2026 · 4dchess.lol (opens in a new tab)

  2. Has a privacy policy.

    Checked 7 Oct 2026 · 4dchess.lol/privacy (opens in a new tab)

  3. No payment provider or pricing was found on the live site.

    Checked 7 Oct 2026 · 4dchess.lol (opens in a new tab)

  4. The old Pages deployment is marked archived and points to the new domain for multiplayer and new features.

    Checked 7 Oct 2026 · 4d-chess.pages.dev (opens in a new tab)

  5. The policy was updated on September 12 and notes retired statistics, so it's being actively maintained.

    Checked 7 Oct 2026 · 4dchess.lol/privacy (opens in a new tab)