Every word you play is a data point. Over time, we build a high-dimensional map of how your mind connects ideas. This is how it works.
Choose 5 Topic Anchors
When you sign up, you pick 5 topics that define your cognitive universe — things like Space, Music, History, or Biology. These become the axes of your personal Cognitive Radar.
Play the Word Chain
In each match, players take turns submitting a word related to the previous one. No rules about what's related — that's the AI's job. The chain can go anywhere.
AI Judges Every Word
Powered by Gemini's text-embedding-001 model. Each word is converted to a 768-dimensional vector. Cosine similarity determines if it's related enough. Below 0.65 — you're out.
Your Radar Evolves
After each game, our BullMQ worker compares every word in the chain against your 5 anchor vectors. Words that land near an anchor add to your score for that topic. Play more, reveal more.
The Semantic Gravity model
Think of your 5 topic anchors as gravitational wells in semantic space. Every word you play gets embedded and compared to all 5 wells. The closest one gains points equal to cosine_similarity × 10, but only if similarity exceeds 0.35.
Over dozens of games, the accumulated scores build your Cognitive Radar — a personal map of where your thinking naturally orbits. Players who frequently bridge distant concepts show high scores across multiple anchors. Specialists show one dominant spike.
Common questions
What makes two words 'related'?
We use Gemini's semantic embeddings. Words close in meaning share similar vector directions in 768-dimensional space. 'ocean' and 'depth' are close. 'ocean' and 'carburetor' are not. It's meaning, not spelling.
Can I game the system by always playing safe words?
You can, but your radar won't grow. Safe, generic words don't pull strongly toward any anchor. Bold, specific associations are what shift your fingerprint.
What happens when I'm eliminated?
Your words still count toward your analytics. Being eliminated just means one of your words didn't clear the similarity threshold — it happens to everyone.
How many players per game?
Up to 4 players per room. Last player standing wins. You can also play solo against an AI opponent.