I'm saying the cityscape here is the main subject, with the sky in the supporting role, the opposite of the challenge brief. I think it's a fantastic image though so I am torn. Nonetheless, I'm knocking a point off for my perceived DNMC.
A great city skyline shot and you've brought out the blue of the lights wonderfully. The sky does add an interesting contrast but I feel is not dominating enough to be considered a skyscape image.
Whilst a nice shot, I see the buildings and the light as the main subject with the sky as a supporting role, opposite to the challenge brief. I am therfore knocking a point off for my perception that this DNMC.