Well, look at the picture. She's wearing pink, she is smiling, she has a cane, it looks slightly painful to move, and slow--and you have a caption suggestive of what moves a Queen can make on a chessboard and she's in pink, and smiling and looks hardly capable of going anywhere, which is at odds with your caption, hence the humor. Okay--she doesn't have a cane--but doesn't it look like she needs one?