@OP: That is actually your rating, not a score; and yes, that is exactly how a rating works. 
Scoring
Sort:
Most Recent
Forum Legend
Following
New Comments
Locked Topic
Pinned Topic
I have played a number of games and was doing ok... got my score close to 1100. I then found I couldn't beat anyone and tumbled back to 1000. Am I matched against better players the higher my score is?