Rookie of the Year - Answers
For the best answer by someone who hasn't submitted an answer prior to 2017 (i.e., not necessarily a new user, but just someone who's a new answer writer).
Build a fewest-moves freecell solver By Christopher 2EZ 4RTZ
Self-nomination
I know this was also nominated by me but it fits in both categories. My first answer was back on January 24th and I really fell in love with this site. I bet other people will have better choices but what is the fun without a little chance!
Output with the same length of the code aka Segmentation Fault, MD XF
Self-nomination
Well, it was my 14th answer on this site (all in 2017) and the first to get more than two votes. I repcapped about 3 times from this answer and it became a PPCG meme, which was fueled when I got another 56 upvotes for a seg-fault.