This is an entry to the 19th Fortnightly Topic Challenge
Here is a relatively simple chess rebus:
Hint 1:
The chessboard is inessential for interpreting the second image.
Hint 2:
The first component is rather obvious, but the second is not.
Hint 3:
♀
The chessboard is inessential for interpreting the second image.
Perhaps the second is not a knight, but simply a horse? $\endgroup$