AI Game Cards

Guessing games & 20 questions for ChatGPT, Claude & Gemini

Updated

Guessing games whose answer is fixed before your first question — the AI answers from a sealed card, not from whatever fits your last guess. Free, no signup. Each game is a ready-to-play prompt (we call it a game card) that you open in your own AI assistant.

A guessing game with an AI, such as 20 questions or finding a hidden country from clues, is fair only when the answer was fixed before you started. On these cards it was: every hidden thing and everything the host will tell you about it is sealed under a SHA-256 hash before release, and the assistant answers from that file instead of deciding as you go.

New to AI games? Read the best games to play with ChatGPT, Claude & Gemini.

GameWhat it isPlayersLengthAges
Bigger Than a Breadbox: A 20 Questions Game A 20 questions game where the AI's answer is locked before you ask: ten sealed things, a written procedure for all other questions, each costed answer logged. 1+ 30–60m All ages
Six Bearings: Geography Guessing Game A geography guessing game: find eight hidden countries from six clues each, and get a sealed distance and direction for every wrong guess. 1+ 20–40m All ages
AGC · 033 ◆ FIRST Guessing Games Bigger Than a Breadbox: A 20 Questions Game 1P+45mSEAL AGC · 034 Guessing Games Six Bearings: Geography Guessing Game 1+P30mSEAL

Can ChatGPT play 20 questions without changing its answer?

In a plain chat there is nothing for the assistant to hold. Ask it to think of something and the thing exists only in the conversation, so each answer is whatever sounds likely and the object is settled only when you guess. A 2026 paper proves that an agent restricted to the public conversation cannot both keep a secret unresolved and stay consistent with it. Geography guessing adds a second failure: asked for a distance or a direction, an assistant works it out and can state a wrong one with confidence.

These cards fix everything first. Bigger Than a Breadbox seals ten well-known things with coded answers to sixty-seven common questions and a written rule for every other question, and logs each costed answer with the code or words it used. Six Bearings seals eight countries, six sourced clues for each, and a distance and map direction from every country on its 72-country atlas, so a wrong guess gets a bearing looked up from a table, never one worked out on the spot. The assistant fetches the sealed file when the game starts, so the chat has to be able to open a link.

The seal proves the hidden things did not move after release; rebuild the hash at /verify/ when you finish. It does not prove every answer was right, because a host can misread its own file, which is why each answer stays on screen with the code or bearing behind it and the whole file is yours to read afterwards. Both cards are rated for all ages and play at one screen: a family can ask the 20 questions as one team, and a class can play the geography rounds as one player.

Questions about guessing games & 20 questions

Can I play 20 questions with ChatGPT where it thinks of something?

Yes, with a card that thinks of it first. Bigger Than a Breadbox holds ten sealed things and the AI only answers: YES, NO, SOMETIMES or PARTLY, each costing a question, or REPHRASE for a question that is not a yes or no and NOT ON ANY CARD for trivia it does not cover, both free. You name each thing in as few questions as you can, twenty at most. If you want the AI to guess what you are thinking of instead, there is nothing for it to hide, so a plain chat can play that way; the best-games guide has a prompt for it.

Is there a geography game I can play with ChatGPT?

Six Bearings hides eight countries and gives six clues for each, hardest first. Every wrong guess comes back with a sealed distance and map direction from the country you named, so you can close in the way you would on a map, and it costs two of the round's six steps. It takes twenty to forty minutes for one player or a class with one person typing, and each finished round's sources are read out. Common English names count, and so do the cities printed on its atlas and a list of common misspellings.

Are they suitable for children and classrooms?

Yes. Both are rated for all ages, neither asks for a name or any personal detail, and every thing in Bigger Than a Breadbox is one a child and a grandparent both know. With younger children a parent or teacher should be at the keyboard, because the game runs inside a general-purpose assistant.

If you like guessing games & 20 questions