Last weekend, we had the last round of the German Olympiad of Linguistics (it’s really the selection of the German teams to the International Olympiad of Linguistics, but that’s even more verbose). Designing that last set of puzzles in time hasn’t been easy, but I had awesome support from my colleagues Ruben Van de Vijver and Johanna Mattissen, who gave me very nice datasets for the construction of puzzles from Dutch and Nivkh. My student Alina Schünemann with her friend Augusta Ogechi Chukwu designed a wonderful puzzle on Igbo. And my student assistants tried and tested them. If you think you can best the high school students who cracked these puzzles in well below two hours (and if your German is sufficient), you can try your hand at them (solutions to follow soon).