> So what you have to do is recognize this situation and throw in a word with all of the possible missing letters to tell you which one is the right one. Obviously you need 2 guesses left at least for this to work.

This advice applies much better to Wordle than it does to Quordle, though. Quordle gives you nine guesses. Four of them are already taken by the need to provide four answers. Three or four go to your fixed opener. That leaves you either one or two discretionary guesses. If your opener ended up giving you trouble with more than one word, you're basically hosed.