DINE
If 2, then the score is ?IN? because,
MINE - 2
CORe - 0 so the E cant be in the equation.
DINE - 0 so the D can be in and dont score.
So if the I and the N can score, then the score would be 2 sinde they are both in the word DINE.
If 1, then the score is M??? because if M and one of the I or N can score then the score is one because M is replaced by a letter that cant score and either I and N is the second letter. But we don't know which one so the score is M???.
EDIT: If the I is in this equation, let WbB have it. He posted before me.