Hey, thank you for playing and for the feedback. I'm not sure how to solve that, though.
I've tried to make the game behave similarly to the Zebra Puzzles [1], where each clue is validated against whatever is on the grid right now, not against the expected answer.
[1]: https://www.zebrapuzzles.com/ (I run this one as well)
I feel like there might be a green/yellow/red situation here, where red indicates inconsistency with marked information, while yellow indicates "not satisfied YET, but could be with marked information"
If Q1 is "the answer to Q2" and I mark A:A, Q1 should be red if A is crossed off for Q2, yellow if A is still an option for Q2, and green if A is the chosen option for Q2.
Thanks, that seems like the way to solve this. If this game gains some traction I'll implement this. Right now the crossed off alternatives are local only and the server side checker wasn't made thinking of that.