Doku
Geodoku

The daily puzzle

Nine cells, two criteria each, one grid a day.

Every cell crosses its row criterion with its column criterion: find an answer that matches both. The rarer your answer among players, the more points it scores.

The 197 capitals of the world

Free, no sign-up: one grid per universe per day.
Free play · Endless grids, no score, no leaderboard.

Example gridGeodoku Capitals
More than 5M people
One-word name
Currency: Euro
In Europe
London+33
Berlin+27
Rome+39
In Asia
Tokyo+19
In South America
Lima+64
London is in Europe and has more than 5 million people: it matches both criteria of its cell. A capital can only be used once.

How it works

  1. 1Fill the nine cellsTap a cell and search for your answer. It must match both its row and its column criteria, and each answer can only be used once.
  2. 2Three livesA wrong answer costs a life. Out of lives, the game ends, but the cells you found still count.
  3. 3Come back tomorrowOne game per universe per day. Playing every day grows your streak.
How points work

The rarer your answer among players, the more it scores. An answer nobody thinks of is worth far more than the obvious one. Mistakes cost a few points, and finishing fast earns a small bonus.

See the full rules

Geodoku Capitals takes the Doku idea to the 197 capitals of sovereign states. Nine cells, one criterion per row and per column, and at every intersection a capital that meets both. Europe crossed with Coastal capital: Lisbon works, Madrid doesn't.

One grid a day, the same for everyone, three lives, a rarity score and a leaderboard. Free play generates unlimited grids.

What the grid asks for

Coastal or landlocked capitals, capitals on an island, at altitude, in the European Union, sharing their country's name, not the largest city of their country, city population, continent, first letter and number of words.

Frequently asked questions

Are Cardiff, Edinburgh or Belfast answers?
No. Only capitals of sovereign states are on the list: for the United Kingdom, that is London.
How is a capital's population counted?
By the city in its administrative sense, not the whole metropolitan area.
Is Geodoku Capitals free?
Yes. Today's grid and free play are free to play in the browser, no account required. The Doku app is also available on iPhone and Android, with the same grids and the same progress.

Or pick your universe