This is an archived problem from a previous year. Submissions are closed, but you can view the problem and its solution.

23

You may notice that the coordinates are gone today! That's because we are not given which side of the board is White and which side is Black. It's up to you to find out!

Given that this position could be reached in a legal game of chess, and that no piece was captured on the last move, are we seeing the board from White's or Black's side?

You don't need to explain your answer, simply stating the name of the color on the bottom is enough.