FAQ

WhoGuessr is a deduction game. Build a board of people from Wikipedia, ask your own questions, and manually rule out cards to find the hidden answer. Place boards are at WhereGuessr.

Yes — Definitely true of the hidden card.

No — Definitely not true.

Sort-of — Partially true, or depends on interpretation.

Maybe — The AI isn't confident enough to commit.

The AI sees two things about the secret card: its Wikipedia article and its image. You can ask about either one.

Good questions about the image:

• "Is the person wearing glasses?"
• "Does the person have dark hair?"

Good questions about the Wikipedia article:

• "Is this person still alive?"
• "Was this person born in Europe?"

Start broad to eliminate half the board, then get specific.

Yes! Ask in whatever language you like — the AI will reply back in the same language.

A cryptic, crossword-style clue about the secret card. Tap the hint button in the toolbar to reveal it. Using the hint doesn't count against you — it's there if you're stuck.

Yes! Type your guess directly into the question box. If you say something like "Is it Thomas Edison?" or "I guess Edison", the game will recognize it as a guess and check it for you.

Concrete, specific categories work best. Be explicit about what you want and what you don't.

Great prompts:

• "famous scientists"
• "Olympic athletes"
• "film directors"

Avoid:

• Vague prompts like "things" or "stuff from the 90s"
• Very niche topics that may not have enough Wikipedia entries

Adding exclusions (like "not the TV series") helps the AI avoid pulling in loosely related entries.

12, 16, 24, 48, 128, or 256 cards. Bigger boards are harder — more suspects to eliminate. 24 is the default and a good starting point.

A new board every day at midnight UTC. Everyone plays the same puzzle. Your streak is tracked locally — complete consecutive days to build it up.

Yes! After creating a board or winning, use the Share button to copy a puzzle link. Your friend gets a fresh game on the same board with a different secret card.

No — the AI blocks blatant cheats. Questions about the title's spelling, letter count, or alphabetical position are also blocked. But you can ask about anything factual, visual, or categorical.

The AI answers based on the card's Wikipedia text and image, so it's usually accurate. "Maybe" means it genuinely isn't sure. Occasionally it may get a nuanced question wrong — that's part of the challenge.

Each player gets a secret card and the opponent tries to guess it. It's turn-based: ask a question on your turn, answer on your opponent's turn. First to correctly guess the opponent's secret wins.

All board entries are real Wikipedia articles. The images and summaries are pulled live from Wikipedia's API.

Game history and daily streaks are stored locally in your browser, so clearing your browser data will reset them. Your sign-in account only tracks whether you're allowed to play — nothing else.

Sign-in is required to ask questions. It's the only way we can keep the AI running for real people without bots burning through the budget. Sign-in is free and quick — just your email or a passkey. We never send marketing, sell your address, or share it with anyone. It's purely a "you're a human" check.

Maybe! But I like making fun things and trying out new tech. Each question costs roughly what an SMS did in the 2000s. If the game gets popular I may need to introduce a freemium model to keep the lights on. With luck, more players means a better cache hit rate and lower per-question costs — but that's still TBD.

If you'd like to help keep it running, you can support me on Ko-fi.

Join the Discord — it's the place for suggestions, bug reports, and hanging out with other players.