地主研究所
Dou Dizhu endgame puzzles for iPhone and iPad: open-hand one-on-one positions you crack by finding the winning line of play. The developer says it was made entirely with Opus 4.6 through Cursor.
Links go to the official store or developer page. Last verified Nov 4, 2026.
Where to play
Every platform this game is on. Links are checked against official sources; we never host or mirror games.
- View on the App StoreApp StoreReleasedFree-to-Play
Install from Apple's App Store on an iPhone or iPad.
Mobile · Official link verified Nov 3, 2026.
About 地主研究所
地主研究所 (roughly "Landlord Lab") is a puzzle app built on endgames (残局) of Dou Dizhu, the Chinese climbing card game: each level is an open-hand, one-on-one position, and you have to find the line of play that wins. The App Store description, which presents the app as a logic-training tool rather than a game, says it has more than 300 endgames, a simulation engine the developer built for testing different lines of play, and a dashboard that tracks your decisions; the developer adds that each level comes with explanatory notes. Updates added a challenge history, sharing, achievement badges, a light theme and codes that open a specific endgame. It is free on the App Store with in-app purchases, including a full pass (逻辑大师 · 全通证, ¥6) that unlocks all levels, unlimited simulations and the full analysis. The App Store lists it under Education and Productivity; the developer says it was deliberately listed outside the Games category as a thinking-training tool. It is in Simplified Chinese only. The developer, posting as TinyGaga on V2EX, says it was made entirely with Opus 4.6, used through a Cursor Pro subscription.
How it was built
Partially verifiedIn a V2EX post (Chinese) titled "全程 Opus 4.6 弄了一个 iOS 版斗地主残局游戏" (made an iOS Dou Dizhu endgame game entirely with Opus 4.6), the developer says they had recently subscribed to Cursor Pro, which let them use Opus 4.6, and made the iOS game with it, updating it over several versions. Asked where the images and icons came from, the developer says they are built-in icons that the AI found when asked.
Opus 4.6 is the model named in the post title, used inside Cursor.
Made with Opus 4.6 in Cursor, per the developer, and updated three times in its first two weeks on the App Store: 1.0 on 30 Mar, 1.0.1 on 2 Apr, 1.1.0 on 8 Apr and 1.1.1 on 13 Apr 2026.
- Engine / framework
- Not disclosed (iOS app)
- Languages
- Not disclosed
- Team size
- Not disclosed
- Initial build time
- Not disclosed
- Development time
- Not disclosed
- Development cost
- Not disclosed
- AI-written code
- Not disclosed
“前一阵子开了 Cursor Pro ，也算是能用上 Opus 4.6 了 弄了一个 iOS 小游戏，斗地主残局”Verification notes: AI use comes from the developer's V2EX post (9 Apr 2026, China time), which links the App Store listing, and the developer's replies there; the post gave away promo codes and asked recipients for five-star reviews. The App Store listing (China storefront, observed 4 Nov 2026) names the seller as 贺 刘 (copyright © 2026 He Liu); the V2EX account TinyGaga is tied to it only by that link. Price, in-app purchases, version history, categories (教育 and 效率, Education and Productivity), the 4+ age rating, Simplified Chinese and device support come from the listing and Apple's lookup data; the lookup also returns the app for the US, Taiwan and Hong Kong storefronts. The listing showed 5.0 from 2 ratings, and the review shown was posted under the name TinyGaga, the same as the developer's V2EX handle (observed; not recorded as a metric). In reply to a forum question about the approval number (版号) that games need in China, the developer said the app is listed outside the Games category as a thinking-training tool. The description mentions "AI" computation for finding the best line in its self-built simulation engine; we could not tell what this is, and nothing indicates a language model or generated content during play. Team size is not stated. The app was not played.
Development history
Version 1.0 released free on the App Store.
OfficialApple App StoreVersion 1.1.0: updated endgames, codes that open a specific endgame, achievement badges and a light theme.
OfficialApple App StoreThe developer shares the game on V2EX with promo codes.
DeveloperV2EX (TinyGaga)Version 1.1.1 fixes repeated clipboard requests for endgame codes and adds live notices for unlocked achievements.
OfficialApple App Store
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.
App Store (iOS)
Free with in-app purchases (China storefront, observed 4 Nov 2026): 逻辑大师 · 全通证 ¥6.00, 思维工具箱 ¥3.00 and 高级思维闯关包 ¥3.00. The description says the full pass unlocks all 300+ levels, removes the daily limit on simulations and opens the full analysis. Requires iOS 16 or later; version 1.1.1.
Not publicly available: Gross revenue.
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Sources
| Source | Type | Published | Accessed |
|---|---|---|---|
| [送码]全程 Opus 4.6 弄了一个 iOS 版斗地主残局游戏，有喜欢玩的吗？ V2EX (TinyGaga) · Chinese (Simplified) | Social post | Apr 9, 2026 | Nov 3, 2026 |
| 地主研究所 on the App Store (China) Apple App Store · Chinese (Simplified) | Store page | Mar 30, 2026 | Nov 3, 2026 |
- Game or tool
- The App Store lists the app under Education and Productivity and describes it as a mathematical-model analysis tool with the randomness and entertainment elements of traditional card games removed; the developer calls it an iOS mini game and says it was listed outside the Games category on purpose, as a thinking-training tool. (Apple App Store, V2EX (TinyGaga))
