An
international competition held every
October, in which teams of 4
puzzle solvers from various countries compete on a set of
language-neutral puzzles, thus mostly
logic puzzles and
math puzzles.
The U. S. team holds a qualifier in June, and some other countries use this test in forming their teams as well. See www.puzzles-usa.org for more information. I will be trying out again this year, after narrowly failing to make the team last year. Wish me luck!
Wei-Hwa Huang is the most successful puzzlist at this event, having won the individual title 4 of the last 5 years.