I happen to like puzzles of every variety. This is one I ran across recently and last night I attempted to solve it.
I have to tell you that I could not! I worked on it for about an hour and came close. Perhaps if I'd stayed with it I could have filled in the missing parts. However, I just gave up and decided to share it with you.
If you decide to try, here's a hint: You must chart it out and use the process of elimination to fill in some blanks. I knew this because I have a similar puzzle, not attributed to Einstein, that I have kept many years and I solved that one by charting it out.
If you're curious and want to know the answer, find it here.
If you solve it, congratulations -- you are said to be among two percent of the people who can solve it.
Also, if you Google "Einstein's Riddle," you'll see there are other versions out there.