S E T F R E E

Place an A, B, or a C in each empty cell of this grid so that no three consecutive cells in any horizontal, vertical, or diagonal line may contain a set of identical letters (such as B-B-B) or a set of three different letters (such as C-A-B).

Can you ensure a set-free grid?

Click on an open square to cycle through the letters A, B, and C until the puzzle is complete.