This fits the challenge however I feel it doesn't do more than that. The cropping is too tight and the image could be sharper. Also the image has too little contrast and for a black/white image that's pretty much the kiss of death in these challenges. If you have access to a program like Photoshop or a free version like GIMP, I would make a histogram adjustment (levels or curves) to make the blacks blacker and whites whiter. A levels "auto" adjustment would accomplish that.
However, improving this photograph with editing wouldn't have gotten you a much higher score as the photo itself feels too much like a snapshot to begin with. While those can sometimes producing great candids and keepsakes they are generally not scored highly in the challenges so keep that in mind. To improve in the challenges you need something that says wow to the voter and probably the best way to do that is with lighting and color along with post processing. So if you are interested in any studio work or editing in general I would frequent the forums as there are lots of good info there to get you started.