Sort the mingled cards of the presidents of the United States of America into the right order. To do this, click first on a field (letter card) & afterwards click on a second card, which makes the presidents change their place in exchange. - If you click on the Button "Evaluation", you will see a display which shows the pictures already on the right place, as well as those 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 presidents 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. By this Evaluation scheme you may pretty soon solve the problem , don't you? .. and by the way you can learn some history in a playful mode! Further sorting riddles follow soon!