Full world coverage
Every independent and dependent territory from the UN dataset is pre-normalised so the genie recognises spelling variations and aliases.
Geo-Zini by Zinvana
Geo-Zini Country Guesser
Think of any country. Answer yes or no.
Geo-Zini uses information-gain questions to narrow the world down to a confident guess—fast, and without sign-up.
Overview
How the Geo-Zini narrows the field
The Geo-Zini uses a dataset of 190+ countries and territories, applying entropy-based questioning to efficiently zero in on your selection.
Smart questioning
Each question is selected to maximise information gain, effectively halving the pool of possibilities with each answer.
Live transparency
Status chips, history logs, and accessible announcements keep you informed about how many countries are still in play.
Signature challenge
Play the Geo-Zini challenge
Answer yes/no (or tap restart) to guide the Geo-Zini toward your country.
Live status
Loading dataset...
Auto-updates after every answer
Countries loaded
190+
UN members & special territories
Questioning mode
Entropy driven
Designed to halve the pool
Live deduction
Geo-Zini asks
Preparing the scrolls…
Tap "Yes" or "No" — every answer reshapes the candidate map.
Resets the board instantly if you want a fresh mystery.
Geo-Zini result
Live
I think you're in
Gathering signals from your answers…
Tap "Yes" to lock it in or "No" to keep narrowing down.
Each reply sharpens the silhouette of your secret nation.
Question trail
Result clarity
Each reply squeezes the entropy footprint and nudges Geo-Zini toward a confident revelation. Keep answering to light up the trail.
Strategy
Tips for stumping the genie
Mix hemispheres
Pick territories that straddle equators or continents to trigger nuanced follow-up questions.
Remember dependencies
Dependent territories with limited recognition still sit in the data, so the genie can chase niche choices.
Use languages as wildcards
Countries with five or more official languages create interesting entropy splits late in the game.
Trivia
Did You Know?
Expand your world knowledge while you play.
Most Neighbors
China and Russia each share borders with 14 other countries, the most of any nation.
No Capital?
Nauru is the only country in the world without an official capital city.
Time Zones
France covers the most time zones (12) due to its various overseas territories.
Shortest Border
The border between Botswana and Zambia is only about 150 meters long.
Under the Hood
How Geo-Zini Works
Geo-Zini isn't magic—it's math. The game uses a decision tree algorithm based on entropy reduction.
Every time you answer "Yes" or "No", the game calculates which next question will eliminate the most remaining possibilities. It's like a game of "Guess Who?", but with 195+ countries and territories.
By analyzing properties like hemisphere, language, population, and borders, Geo-Zini can usually identify any country in fewer than 15 questions.
Support
Frequently Asked Questions
How many questions does it take?
Typically, Geo-Zini can zero in on your country within 15-20 questions, thanks to its entropy-based questioning strategy.
Is Geo-Zini free to play?
Yes, Geo-Zini is 100% free and requires no registration or download.
How many countries are included?
The database includes all 193 UN member states plus major territories and observers, totaling over 240 entities.
Do you collect personal data?
No, we do not collect or store any personal data. Your game session lives entirely in your browser.
Can I play offline?
Once the page loads, the game logic runs entirely in your browser, so you can keep playing even if you lose connection.
Is this good for students?
Absolutely. Teachers use Geo-Zini to help students learn geography, critical thinking, and deductive reasoning.
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