? As in Worldle itself (except in hard mode), you don't need to match what you've deduced already . So, your second line could have been some equation with (most of) the digits 3,4,5,7,9 (and whatever you need to make it an equation). The colour of those then would have told you all you need to know to win.
Worldle hard mode is solvable but it requires being very careful, and basically never typing in certain words.
For example: bills,dills,fills,gills,hills,kills,mills,pills,sills,tills,wills
If the answer is any of these words and you guess the wrong words once, you are unable to guarantee a win (outside of hard mode you could try guessing words to eliminate many letters at once)
I find that constraint to be roughly, if not more, frustrating than commutativity (which doesn’t even apply to subtraction or division!)
