I'm currently working on a game where players are trying to complete a three part thing. I am running into a roadblock however where I can't figure out to incorporate the third element. I need something that A can be solved by B but not by C. The same goes for B which can be solved by C but not A. Finally, C can be solved by A but not B. To hopefully make this clearer:
A+B = TRUE
B+C = TRUE
C+A = TRUE
A+C = FALSE
B+A = FALSE
C+B = FALSE
I'm not sure how to make this work in a way that makes sense to the player. One element needs to be solved exclusively by the other but it can't work if done backwards.
This is most likely going to be represented by cards. Any ideas for how to make this work mechanically or thematically?