As you may know, there were more than 500 contestants this year because of the RSVBee program, in which spellers who don't have a local paper to sponsor them or didn't win their regional bee still have a shot at entering the NSB and becoming the next champion.
As every year, the National Spelling Bee's website has allowed visitors to take the preliminary test the contestants at the bee took, to see whether said visitors would have made it to the semifinals had they been a contestant this year. As one article noted, this year the preliminary test was so tough that no speller received a perfect score.
You may take the test at http://spellingbee.com/take-test
That's correct! You've completed the Preliminaries with a total score of 34.
The score necessary to advance to the Finals of the 2018 Scripps National Spelling Bee was 28.
Congratulations, and thanks for playing!
Wow -- I would have been one of the top scorers!
And by the way, all five of the top scorers on the preliminary test this year were in the final sixteen!