You know the Liar variant where exactly one clue in each row/column is wrong? Okay.
You know the Cipher variant where all numbers are replaced with letters (identical numbers are replaced with identical numbers and different numbers are replaced with different letters)? Okay.
What happens if you combine both?
You say it’s impossible? Well, I also did say that when someone attempted to make it. But well… Yoshiap pulled it off.
Enjoy his Liar Cipher Fillomino. Let’s see whether I can make one of it too. Whee.