Recently I've gotten into logical puzzles and maybe we can get a thing going on this board here too.
Imagine a standard 8x8 chess board. Instead of black and white you have 4 different colors for chess pieces and at your disposal are 6 queens for each color. Meaning you have a total of 24 chess pieces. How do you position the queens so that each of them can hit exactly one queen of every other color? How many they hit of their own color is irrelevant.