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 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.

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