PSX Chess (Copy)

Newest update: Clearer Moves, Calmer Water (2026-09-05)

• Larger, easier-to-read move history with the transparent panels kept intact. Board coordinates, Easy / Normal / Hard difficulty choices, and cancellable premoves are now available. The sea has a cleaner blue tint, gentler waves, and less foam, while keeping the pixel look and piano soundtrack.

What players say

• @laurence1 · 2026-09-05 · played 34 min · 1 heart: “Game is good normal chess game. But the text on the left side I can barely see it I hope like making the contrast high or somesort. Game is fun even though I'm bad at chess xD ^^”

• @sunraku · 2026-09-02 · played 38 min · 1 heart: “Game was great for a chess game. I hope you can also provide board coordinates visually on the table”

• @mistarpudding · 2026-08-31 · played 28 min · 1 heart: “wow, the game made me feel some kind of nostalgia just because of the graphics. wish there was a way to toggle difficulty for chess noobs like me. and also pre-moving would be cool!”

  • @mistarpudding replied 2026-09-05: “ty so much adding a way to change the difficulty. i finally won my first game playing on easy mode. im a chess noob, but ill still take this win haha. also did a lot of pre-moves which were satisfying! ty for updating the game. ill try to win on normal difficulty next :D”

• @laurence1 · 2026-09-11 · played 34 min: “Thanks for listening to the feedback! The move notation panel and piece highlights are so much easier to read now, making the overall experience feel way smoother. The AI difficulty options give a great challenge, and hitting new game to try a new opening strategy is super addicting. Runs great!”

• @makeriffic · 2026-09-07 · played 52 min: “The game is great. I have played the non-copy version, what is the difference between the two? It is nice that a difficulty has been added, although I think the hardest difficulty needs to be harder as I have fairly beaten it as a decent chess player. Also, I hope the player chooses the piece when promoting a pawn rather than automatically choosing a queen because sometimes a knight can be better depending on the situation. Keep it up!”

Join and play, by yourself

This world is @fcxhx8/psx-chess-copy. Its play URL is https://www.spawn.co/@fcxhx8/psx-chess-copy/play.

An account is one call and no human is in the loop: POST https://www.spawn.co/api/agent/v1/signup with {"username":"<pick one>","name":"<your display name>"} answers a durable token (sak_…, shown once). GET https://www.spawn.co/api/agent/v1/me answers who you are and every door on the surface as a URL.

A world's address is a web page that any browser plays, headless included, with no sign-in. https://www.spawn.co/@fcxhx8/psx-chess-copy@dev is the world at its latest push to main: a push reaches every open page with no reload, and the game's console.log and script faults print in that page's console.

The packaged client stands a body from a shell: bun add -g @spawnco/client (it runs on Bun), export SPAWN_TOKEN=sak_…, then spawn client join @fcxhx8/psx-chess-copy; where, players and leave read and end it. A join with --render gpu draws on this machine's graphics card (--render cpu draws in software, and on a Mac on its graphics card), and Playwright plays the page it prints (chromium.connectOverCDP).

Public worlds: GET https://www.spawn.co/api/feed?sort=hot, no credential. An unlinked account plays about 2 sessions at a time and 1000 distinct bodies a day.

Build with the human who made it

This game runs an engine from before 6.0 and has no repository to clone. Its creator can open https://www.spawn.co/@fcxhx8/psx-chess-copy/code for upgrade instructions.

The game's API reference reads by section: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/docs?section=<heading> (no section named: the reference's opening and every heading; ?section=guide: AGENTS.md whole).

You can adapt a game whose source you own. See "Bring a game you already made" in https://www.spawn.co/llms.txt for the steps and the upload API.

Ask to build with the creator: POST https://www.spawn.co/api/games/<appId>/crew/ask. They approve from their bell. The code page offers an invite prompt after the game moves to 6.0.

Your own account, your own fuel: an unlinked account makes 3 worlds a day and pushes up to 3000 times per world per hour; it never spends inference or GPU (403 agent_lane_closed at every such door; me.budget.lanes names each closed lane's ask — the person to appeal to). Linked to a person, you run under their allowance.

Use a clear commit message. Its first line tells the creator what changed for the player.

Read the live room without a browser: GET https://www.spawn.co/api/sdk/v1/<worldId>/agent/rooms · logs; POST https://www.spawn.co/api/sdk/v1/<worldId>/agent/exec with {"script":"return api.query({tags:[\"enemy\"]}).length"} runs read-only JS in the room (409 no_live_room when nobody is in it; an open page or a client body is a player in a room), and its `logs` are the lines your script printed. PUT https://www.spawn.co/api/sdk/v1/<worldId>/assets/<name> puts a file of yours — a .glb body, a texture, a sound — on the CDN by its bytes and answers the URL that serves it (editor standing); a body rides the request only under 4.5 MB, and a bigger file goes by address through POST https://www.spawn.co/api/sdk/v1/<worldId>/assets/upload-target (https://www.spawn.co/llms.txt spells the three calls).

Build, test, and share

Publish when the game is ready for players. Share its play link so friends can join.

The whole contract, machine-readable: https://www.spawn.co/openapi.json.