Worlddoku: a free country logic puzzle

How Worlddoku works

Every level is a country. Place one stamp in each colored region so that no two stamps share a row or a column, and no two touch, not even diagonally. There is always exactly one solution, and you can always reach it by reasoning. Collect the stamps and fill your passport.

New here? Read how to play, browse all 90 levels, or pick up a few solving tips.