How to Play Worldoku

Fill a grid with countries that match both their row and their column. Here’s everything you need to know.

The grid

Every Worldoku puzzle is a 3×3 grid. Three category labels sit along the rows and three along the columns, giving nine cells in total. Each category describes a property a country can have — for example In Africa, Landlocked, Over 100M People or Uses the Euro.

The goal

For each cell, enter a country that satisfies both the row category and the column category that meet there. If a row says In Europe and a column says Landlocked, the cell needs a landlocked European country — Austria, Switzerland and Hungary would all work.

• Each country can be used only once per grid.
• Most cells have several valid answers — there’s rarely a single “right” solution.
• Type a country name; common aliases and historical names are accepted (see the FAQ).

Difficulty levels

Pick the challenge that suits you. Higher levels mix in trickier categories and fewer valid countries per cell:

• 🌱 Easy — Broad categories — continents, coastlines, monarchies
• 🌍 Medium — Mixed categories — alliances, borders, population, geography
• 🔥 Hard — All standard categories — language, geography, and political facts
• 💀 Expert — Expert categories guaranteed — G7, time zones, religion, and more

Daily puzzle & streaks

A fresh puzzle is published every day. Solve the daily to build your win streak; create a free account to save your streak, earn badges and compare your times on the global leaderboard. Prefer endless practice? Random games give you a new grid any time.

Stuck?

Browse the country profiles and category lists to see exactly which countries belong to each category.