
Playground — Fabraix
Test your prompt injection skills against AI agents in an interactive competitive challenge.
ibrahim_abdu777 · HN
We are giving away $100K > over the next 12 months to hack AI agents
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Test your prompt injection skills against AI agents in an interactive competitive challenge.
ibrahim_abdu777 · HN
We are giving away $100K > over the next 12 months to hack AI agents

Analyze chess games with natural language explanations using an open-source browser tool with no login required.
u/ICARUS_2X · Reddit
Spent 7 months building a FOSS platform for natural-language chess analytics (No LLM) Hey guys, I've released CHONSE2, an open-source game review platform that offers unlimited analysis and move explanations without using hallucination-prone LLMs, running entirely in your browser. chonse2.com But Lichess is free, so why use this? Some have asked. It expands on Lichess's feature set a few different ways: Full analysis (accuracy/elo estimations/eval graphs, etc) requir

An FPS game built as a parent-friendly alternative to Roblox.
davitb · HN
I'm a father of two, 7 and 12. They are obsessed with Roblox, especially Rivals. Like a lot of parents, we did not love it. We tried the usual things: block it, limit it, set timers." It became a daily battle, a lose-lose situation. So I flipped the problem. Instead of fighting what they loved, I decided to lean into it, but with a twist. Why just play an FPS when you could build one together? My kids became the PMs. Claude and I became their engineer. I was shocked by how fast we moved. We picked a name, Cooked and started building. Get in. Lock in. Get cooked! In the first 3 hours, we had an actual FPS we could play together in the browser. Next day I invited my friend's two kids over. Suddenly, I had four PMs. We had 3 laptops, 1 iPad and 1 iPhone. So in 30mins we added mobile support and could play all 5 together. The kids would ask for features: "Can we have a rocket launcher that knocks people off the map?" "The knife should stab faster when you hold it." I know al

Realtime multiplayer strategy game with dice-driven economy, secret placement, and tactical combat.
@z3roshot · X
Made up a game where chess meets dice: roll, shop, secretly place, fight. ⚄ Same deterministic engine runs the bots and the humans. Server-authoritative so nobody can peek at your hidden pieces. Built with Claude Code. Read more

AI goal app with a trash-talking arch-rival that taunts you daily and duels weekly to push you toward finishing goals.
@nemesis_goals · X
Building an AI goal tracker that hates your excuses and roasts your failures.

Generate playable retro games from descriptions, then publish, share and remix.
@describegames · X
We are seeing so many games on the timeline built with Claude Fable But what happens on July 7 when Fable becomes too expensive for most people, and everyone still wants to build cool AI games? is your answer.

Explore FIFA World Cup 2026 group stage difficulty via simulations and travel logistics analysis.
@pgardunoc · X
I vibe coded this for the World Cup, and other projects

Install solar panels, earn Watts, and raid rivals in a shared pixel world.
@PanelWars · X
We are building a battle field. Come play. ⚡️⚡️

Play quick brain games, puzzles, and arcade challenges on a casual gaming platform.
@taloggHQ · X

Simulate a 64-team World Cup tournament format and see how it plays out.
@accordingtoca · X
This was inevitable, so I designed a format that would actually work and I vibe coded a simulator to demonstrate it. Check it out:

Turn your study notes into competitive quiz battles and get AI coaching on weak topics.
u/Due_Load6189 · Reddit
I built a study battle app and need honest feedback Hey everyone, I’m a student building StudyClash, an app that turns practice questions into competitive study battles. You can try a deck, answer questions, get a score, see what topics you’re weak in, and use an AI coach to understand mistakes. I’m not trying to sell anything right now — I just need honest feedback before I show it to more people. Main things I want feedback on: Is the app easy to understand? Does anything look b

Improve judgment across parenting, communication, leadership, and finance through swipe-based scenario quizzes.
@ShashankBhutiy4 · X
Duolingo for Soft Skills and career growth