Enter the key from Problem 7's side challenge
Wrong key. Go back and solve Problem 7 first!
In chess, each piece is represented by a single capital letter in algebraic notation.
The Rook is R, the Bishop is B, the Queen is Q, and the Knight is N (since K is already taken).
What letter represents the King?
Hint: The Knight uses N because this piece already took the letter that starts with the same sound...
What is 27 divided by 9?
The answer is your key to unlock Problem 9