Pixi 五子棋 · Gomoku
Free · play online in your browser, no download
Open-source browser gomoku with four computer opponents up to a master-level engine, renju rules, friend rooms and treasure-chest rewards. Claude Code built the game itself, the developer says.
Official site gomoku.douni.one, verified Nov 3, 2026. Linked as the play address (在线试玩) from the developer's own GitHub README and V2EX post.
Rights holder / original work: Rapfi gomoku engine (dhbloo; GPL-3.0) and rapfi-networks weights (CC0)
The master-level opponent runs Rapfi, a third-party open-source gomoku engine, compiled to WebAssembly and shipped with the game together with its licence file; the README states Rapfi is GPL-3.0, its evaluation weights come from rapfi-networks under CC0, and the game's own code is released under GPL-3.0 or later. The project structure follows pixijs/open-games (MIT). (GitHub (virgoone))
VibeGameDB lists this game only to document that it was made with AI coding tools. We do not host it, we do not represent the rights holder, and listing it does not mean it is licensed.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- Play free — official siteBrowserReleasedFree
Runs in a desktop or mobile browser. No download.
Browser (no download) · Mobile · Official link verified Nov 3, 2026.
- View on GitHubGitHubReleased · Source code (GPL-3.0; earlier versions MIT)Free
Source code repository, not a place to play.
Official link verified Nov 3, 2026.
About Pixi 五子棋 · Gomoku
Pixi 五子棋 · Gomoku is a free, open-source gomoku game for the browser, in Chinese. You can play against four computer players: 豆芽 (easy), which scores patterns and sometimes misses things; 狐狸阿明 (medium), which weighs attack and defence and never misses a forced win or block; 猫头鹰棋圣 (hard), an alpha-beta search; and the final boss 神龙棋仙 (master), which runs the open-source gomoku engine Rapfi compiled to WebAssembly and downloaded only when you pick it. You can also play two people on one device, or create an online room with a six-digit code and invite link (peer to peer over WebRTC); if nobody joins in 30 seconds, or an opponent drops out, the fox takes over. The board is 15x15 with black first; besides free-style (five or more wins) there is a renju mode with forbidden moves under RIF rules and an optional RIF opening rule with a three-move swap and two offered fifth moves. In online rooms you can hand your game over to the master engine. Wins open a treasure-chest animation that upgrades by performance, with coins, gems and crowns, Chinese voice lines and synthesised sound; guests save in the browser, and an email login adds a leaderboard, verified by replaying each submitted game on the server, and cross-device sync. The developer, virgo (virgoone on GitHub), says Claude Code with Opus built the main game and the first login and leaderboard, and Codex later handled mobile controls, deployment, save migration and leaderboard consistency; “the model handles implementation and iteration, the human defines the gameplay, gives feedback on the experience and checks the results.” Built with PixiJS 8, TypeScript and Vite; the code is GPL-3.0.
How it was built
VerifiedThe README calls it an open-source browser gomoku “用 Claude Code + Opus 起步并持续迭代” (started and continually iterated with Claude Code + Opus) and gives the division of work: “Claude Code / Opus 完成游戏主体与初版登录排行榜” (Claude Code / Opus completed the main game and the first login and leaderboard). A development note in the repository, “用 Claude Code + Opus 开发一个可以对战的小游戏”, walks through the build step by step with reusable example prompts (rules layer with tests, three computer players in a Web Worker, WebRTC rooms, the result animation, login and leaderboard) and ends: “模型负责实现和迭代，人负责明确玩法、反馈体验并检查结果。” (The model handles implementation and iteration; the human defines the gameplay, gives feedback on the experience and checks the results.) In the V2EX post (30 Sep 2026) the developer says they used Claude to integrate the Rapfi engine.
- DeveloperDevelopment note: the main game and first login and leaderboard were developed by Claude Code / Opus; “模型负责实现和迭代”. — GitHub (virgoone)
- DeveloperV2EX post: “最近用 Claude Code 做了一个浏览器五子棋小游戏” (I recently made a browser gomoku game with Claude Code); “Claude Code 负责游戏主体和初版功能”. — V2EX (virgo)
Per the README, “后续用 Codex 补齐移动端交互、部署、历史存档迁移和榜单一致性等工程细节” (Codex was later used to fill in engineering details such as mobile interaction, deployment, migration of old saves and leaderboard consistency).
PixiJS 8, TypeScript and Vite, with the project structure modelled on the Puzzling Potions example in pixijs/open-games (MIT); most art is hand-written SVG rasterised at load time, animation uses GSAP and all sound effects are synthesised with Web Audio. The three in-house computer players run in a Web Worker as local algorithms; the master opponent is the GPL-3.0 Rapfi engine compiled to WebAssembly (about 1.3 MB), with evaluation weights from rapfi-networks (CC0). Online rooms use PeerJS and WebRTC; login, leaderboard and sync run on Netlify Functions and Blobs with email codes sent through Resend. Voice lines are pre-generated with edge-tts and shipped as audio files, falling back to the browser's built-in speech synthesis if a file is missing. Claude Code with Opus built the main game; Codex continued with mobile, deployment and sync.
- Engine / framework
- PixiJS 8
- Languages
- TypeScript
- Team size
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“模型负责实现和迭代，人负责明确玩法、反馈体验并检查结果。”- virgoone/pixi-gomoku (GitHub)
- Building a playable game with Claude Code + Opus (repository note, Chinese)
- Made an open-source gomoku with Claude, with Rapfi as the final boss (V2EX, Chinese)
Verification notes: AI use, features and stack from the repository's README and its development note docs/BUILDING-WITH-OPUS.md (read raw from GitHub on 8 Nov 2026) and the developer's V2EX post by virgo (virgoone), 30 Sep 2026, read on 8 Nov 2026; the README and the post link gomoku.douni.one, and the post links the repository. The README says Claude Code / Opus completed the main game and the first login and leaderboard and Codex did later engineering work; no percentage is stated. The development note says its prompts are reusable examples reconstructed from the code, not the original chat log. The opponents are local game algorithms: three pattern-scoring and alpha-beta players written for the game, and Rapfi, a third-party gomoku engine that uses a neural-network evaluation; the development note says no model API is called per game, and the site's script contains no AI service addresses. This is classic game AI, not generative AI at play time. Voice lines are pre-generated with Microsoft's edge-tts and shipped as files. No release date is stated; the V2EX post is the earliest public post found, and the README says the licence changed from MIT to GPL-3.0 in September 2026. GitHub's API was not reachable from our environment, so star counts and the repository's creation date were not checked. Chinese (Simplified) interface (lang zh-CN). The developer is known only by the handles virgo and virgoone, so team size is not recorded. The game was not played.
Development history
The developer shares the game on V2EX, built with Claude Code, with the Rapfi engine added as the final boss.
DeveloperV2EX (virgo)
Game performance
Each figure measures something different — concurrent players, owners, downloads and sales are never interchangeable and are never added together. Labels show where each number comes from.
Browser (official site)
Free in the browser with no sign-up; an optional email login unlocks the leaderboard and cross-device saves. Online rooms use the public PeerJS signalling server and may not connect on some networks.
No public metrics recorded for this listing.
Not publicly available: Concurrent players (site), Monthly revenue, Gross revenue.
GitHub
No public metrics recorded for this listing.
Not publicly available: GitHub stars.
Sales & revenue (all platforms)
Browser game — there are no downloads to count.
Reviews & rankings
Not yet reviewed by our editors.
Not currently ranked.
Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| Pixi 五子棋 · Gomoku (README) GitHub (virgoone) · Chinese (Simplified) | Repository | Not confirmed | Nov 3, 2026 |
| 用 Claude Code + Opus 开发一个可以对战的小游戏 GitHub (virgoone) · Chinese (Simplified) | Devlog | Not confirmed | Nov 3, 2026 |
| 用 Claude 做了个开源五子棋，接入 Rapfi 当最终 BOSS，欢迎来挑战 V2EX (virgo) · Chinese (Simplified) | Social post | Sep 30, 2026 | Nov 3, 2026 |
| 五子棋 · Gomoku gomoku.douni.one · Chinese (Simplified) | Official site | Not confirmed | Nov 3, 2026 |
| Official game page (language check) virgo | Official site | Not confirmed | Nov 3, 2026 |
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