Sort the mingled cards a random choice out of 201 countries of the world into the right (descending) order by size. - So with each new start you have another random selection of countries. To sort the countries by size in sq km, click first on a field or picture (it gets a red border) & afterwards click on a second card, which makes the countries change their place in exchange. - If you click on the Button "Evaluation" (or "Check-it"), you will see a display which shows how many of the pictures are already on the right place, as well as how many are already in the same line or row, but not yet on the right place. In detail: The Bulbs on the left & above the game board show how many countries5 are already in each referring line or row on the right place. The display on the right & under the game board show, how many images are already in the right line or row, but not yet on the right place. - You can also mark a picture if it's already red bordered, with a second click on it (it gets a green bordern then) - which can help you to remember not to move a picture by chance, you already know it's on the right place - a further click on this marked picture will remove the green border again.. With the radio buttons on the right below you can switch on & off, whether the population number of the countries is displayd & also you can switch between a display of the country cards from flags to map shapes of those countries. By this Evaluation scheme you may pretty soon solve the problem , don't you? .. and by the way you can learn some geography in a playful mode! Further sorting riddles follow soon!