Scripps National Spelling Bee winners aced "gesellschaft" and "feldenkrais" to be named co-champions of last year's competition, but it was the word "tie" that gave organizers a headache.
On Tuesday, the contest revealed new rules aimed at preventing ties after the annual competition ended in a dead heat three years in a row, with joint winners both getting $40,000 cash prizes in 2016.
Organizers said they would prefer to see a clear-cut champion, rather than a shared title.
The 290 young spelling whizzes from across the United States and six foreign countries in this year's bee will face a new written tiebreaker when they square off May 30-June 1 in a Washington suburb, organizers said.
The written test introduces a fresh hurdle for participants spelling ever-tougher words in the bee, a national institution since 1925.
"During our history, students have expanded their spelling abilities and increased their vocabulary to push our program to be even more challenging," Paige Kimble, the bee's executive director, said in a statement.
Ahead of this year's title round, the finalists will be tested on 12 words, which they will write, and 12 multiple-choice vocabulary questions.
If it is mathematically impossible for one champion to emerge through 25 rounds, bee officials will declare the speller with the highest tiebreaker score the winner. If there is a tie on the test, judges will declare co-champions.
This year's bee will draw contestants ages 5 to 15 culled from more than 11 million in the spelling program. The winner or winners will receive the cash prize of $40,000.
Last year, Nihar Janga, a fifth-grader from Austin, Texas, and Jairam Hathwar, a seventh-grader from Painted Post, New York, were named co-champions after battling 25 rounds head to head.
To gain the title, Nihar spelled "gesellschaft," a type of social relationship, and Jairam aced "feldenkrais," a method of education.