2018 NACLO at Stanford University

Thank you for your interest in the North American Computational Linguistics Olympiad!  The NACLO competition is for high school students (as well as middle school students who are looking for this kind of experience).  It consists of two rounds: the Open Round and Invitational Round. The judges expect that about one hundred contestants will advance from the Open to the Invitational Round. For registration and to find more information please visit http://www.nacloweb.org/

Please keep checking out this webpage regularly for updates!

Open Round (January 25, 2018)

The Open Round is open to all interested middle school and high school students; its purpose is to identify strong contestants who will advance to the Invitational Round. 


  • TIME: You should plan to be present at the contest room at 8:45. You should be seated by 8:55 when the announcements are read. The contest will start at 9:00 AM sharp, and will end 3 hours later at 12:00 PM.
  • PLACE: The contest will be held at the Stanford Graduate Community Center (Havana Room). 
  • PARKING: The closest public parking area is the Wilbur Field Garage. Click here for a google maps link. There is a 10-15 minute walk from this parking lot to the contest room.
    • More info about parking can be found here.
  • Stanford campus is big and confusing so make sure you allow time for finding a parking spot and making your way to the contest room. 
    • A map of the Stanford campus can be found here.
  • Plan to be at the contest room at least 15 mins before the start of the contest (8:45). There is a small cafe close to the contest room that opens at 8am so you can plan to arrive much earlier and have a cup of coffee or tea before we sign you in.
  • Please bring your own black pen -- all solutions must be written in pen. Scratch paper will be provided.
  • You are allowed a basic wristwatch (without built-in calculator) for time keeping. However, no electronic device is allowed.
  • Bring water and snacks to keep yourself fresh and energized during the contest. Place them on the desk before the contest begins.
  • When you arrive, place your bags under your seats. You cannot use your bags during the contest.

Invitational Round (March 8, 2018)

The problems in this round are harder than the Open Round problems. The purpose is to select national winners, who will be eligible to participate in the international competition, the International Linguistics Olympiad (ILO).

Please direct questions for the Stanford Site to stanford.naclo [at] gmail [dot] com