This project presents a known problem, attributed to Einstein in his youth. I do not propose properly its resolution, which would be lengthy and boring. So, I present a resolution path that you should follow reasoning for not to make mistakes. At each step without error you win 10 points, but you cash until a total of 10 if you get it wrong. The maximum score for all steps is 110. The instructions are in the project. If you know or discover a better path to the solution, I'll thank you if you let me know it in comment or by a remix. You can tell your score if you wish :) *********** Additional information: There are different versions of the problem on the Web. Some merely change attributes (such as tobacco brands replaced by professions, or nationalities replaced by others, what I did on the original version), with no change in the problem. But others have very small changes in the writing of two assumptions, which, however, are sufficient to make the problem easier. I searched the version that seems to be the original, without care whether it's true or false that Einstein was the author. The first steps of the proposed path for resolution are the same proposed in Wikipedia, but from them on, I opted by my own solution Source: English Wikipedia - http://en.wikipedia.org/wiki/Zebra_Puzzle - with the writing of the assumptions 11, 12 corrected according to German website. Thanks to ffred by revision of English. Dec 2012