Logical puzzles for everyone

I am for many years enthusiastic Logiktrainer fan. Again and again inspire these puzzles me and my family. The nice thing about the puzzle is to have the often if you believe the right solution found yet again 1 combination is wrong.
So if you a fan of riddles ala "Mr. Müller sitting next to Mrs. Maier the Opposite Klaus sits ............. who sits next to Mrs. Klein?" is should strike.