Five AI players.
One word out of place.

Play Who Is the Undercover with Jev. Read the clues, conceal your role, and cast your vote. Then inspect the evidence, options and scores behind each decision.

YOU + 5 AI PLAYERS2 MODESDECISION REPLAY

Play with 5 AI players ↗How Jev plays →

No signup · 3 games per IP daily · 300 games sitewide daily · Gameplay in Chinese

THE ODD WORD OUT6 PLAYERS

阿岚SECRET WORD ?

小满SECRET WORD ?

YouSECRET WORD ?

老周SECRET WORD ?

阿乔SECRET WORD ?

小陆SECRET WORD ?

Five matching words. One different word. Can you read the table better than Jev?

A new clue can change the decision

Code handles dealing, turns, legal moves and victory. Jev interprets natural-language clues alongside its own word, then selects among bounded identity hypotheses and legal actions.

Assess first, then choose an action

Each AI sees only its own word, public statements and events, and its own action history. It assesses the table before choosing a prepared description, a vote, or an eligible early accusation. It may deliberately blend in when it suspects itself. Speech is selected from prepared candidates, not generated freely.

Two modes, one decision engine

Elimination: vote each round until the undercover is caught or parity is reached. Three-round showdown: vote after round three, with optional early accusations. A wrong accuser is eliminated. AI accusations require at least 80% support for a target, but remain optional.

Inspect what actually happened

The result reveals every role and word. Review the information, options and returned scores recorded at each decision, and download the game log. Scores are not calibrated identity probabilities; the replay does not invent hidden reasoning.

Trial allowance and records

Up to 3 games per IP and 300 games sitewide per day, resetting at midnight Beijing time. A dealt game counts once; reloading and continuing are free. A shared network shares its allowance. Games and logs are retained for up to 7 days; dealing again replaces the previous records. Statements are sent to TypeSafe Jev; do not enter private information. Gameplay is currently in Chinese.

Start playing ↗