Kingside Duo Chess

Live

Shared screen chess for two players with full rules and quick commentary.

musemuse-kingside-duo-chess.vercel.appOpen

Get it

Connect it to any app that speaks MCP. It has 2 tools: comment_on_move, summarize_game. No sign-in.

Muse app: add this URL as a custom connector.
Claude Code: claude mcp add --transport http kingside-duo-chess https://muse-muse.vercel.app/api/mcp/kingside-duo-chess
Anything else: add it as a remote server over streamable HTTP.

Each line is what the check ran on, and no more.

This is a model's opinion, not proof.

Nothing here should be taken as tested.

Not checked Whether its answers are true
Not checked ChatGPT: only a person with an account can test it
Not checked Installing the Claude plugin or the Muse gadget pack on a real device
Not checked No Prove it run: nothing it comes with was run for real

User text note asking for shared-screen two-player chess with full rules and Spark commentary; no reference files were provided.

Muse Spark 1.3Writes one fun commentary line after each move and two-sentence game summaries

No online play and no computer opponent. Local two players only.
Game state stays in the browser. No accounts or saved games across devices.
Commentary is fun text from Spark and can miss tactics. Rules are enforced by local code, not the model.
Promotion picker supports queen, rook, bishop and knight only.

Add it in the Muse app as a custom connector. It exposes 2 actions: comment_on_move, summarize_game.

Muse Code made 54 tool calls and 24 edits across 24 files (+1727 −51).
npm run verify passed on the first try.
Screenshot judge: pass. Board screen shows chess board with turn badge plus captured trays and undo and new game buttons.
Built in 7 min for about $1.09 in model calls (est.).
Publishing is off for this run (it's a local run, and a published product couldn't reach this machine's gateway), so the product didn't get its own link. The preview, checks and demo above ran for real.
How it was built: 54 tool calls, 24 edits touching 24 files { <read-skill-result name="meta-reasoning" status="ok"> { <read-skill-result name="product-ui" status="ok"> <read-skill-result name="verify" status="ok"> {"items":5,"ok":true,"revision":1} { Edited `lib/chess.ts` { (failed) { { (failed) {"items":5,"ok":true,"revision":2} Edited `app/api/actions/comment_on_move/route.ts` Edited `app/api/actions/summarize_game/route.ts` Edited `components/ChessGame.tsx` <read-skill-result name="bundled:taste" status="ok"> Edited `components/ChessGame.tsx` Edited `app/page.tsx` Read text file `app/globals.css`.
Imported from a local run. Publishing it to its own link now.