NACLO - North American Computational Linguistics Olympiad
new
View the new NACLO problem database
A few practice problems to start with:
Click Here
NACLO 2014 Problems
Name
Solution
Author
What's the Time in Tallinn?
Solution
Babette Newsome
Māori Loanwords
Solution
Patrick Littell
Levenshtein's Fine Signs
Solution
Blake Allen and Patrick Littell
Wheel of Fortune Cookies
Solution
Patrick Littell
Visible Speech
Solution
Natalie Weber and Patrick Littell
Lontara
Solution
Chelsea Voss
Cameroon Pidgin English
Solution
Aleka Blackwell
Bertrand and Russell
Solution
Ben King
To play or not to play
Solution
Catherine Sheard
Lexicondensed
Solution
Tom McCoy
Don't be Ukhrul to a Liver that's True
Solution
David Mortensen
Transducing Runes
Solution
Jordan Boyd-Graber
Come to Istanbul
Solution
David Palfreyman
Hungarian Rocks
Solution
Adam Hesterberg
CCG
Solution
Jonathan Kummerfeld, Aleka Blackwell, and Patrick Littell
Combining Categories in Tok Pisin
Solution
Jonathan Kummerfeld, Aleka Blackwell, and Patrick Littell
Learning Yidiny
Solution
Mary Laughren
All Round 1 Problems
All Round 1 Solutions
All Round 2 Problems
All Round 2 Solutions
NACLO 2013 Problems
Name
Solution
Author
Intuitive Inuit
Solution
Harold Somers
A Case of Pali
Solution
Babette Verhoeven
The Heads and Tails of Huffman
Solution
John DeNero
Kwak'wala Word Search
Solution
Patrick Littell
Shaw Business
Solution
Babette Verhoeven
Grammar Rules!
Solution
Andrea Schalley and Patrick Littell
Phoenician Fun
Solution
Harold Somers
Twodee
Solution
Jason Eisner
Beja
Solution
Richard Hudson
Stockholms Tunnelbana
Solution
Patrick Littell
Putting the Books in Order
Solution
Dragomir Radev
Yesbot
Solution
Patrick Littell
Playing the Cognate Game
Solution
Catherine Sheard
A Tree by Any Other Name
Solution
John DeNero
Warlpiri Kinship Groups
Solution
Alan Chang
Deer Father
Solution
Patrick Littell
Grice's Grifter Gadgets
Solution
Jordan Boyd-Graber
Poles Apart
Solution
Dragomir Radev
All Round 1 Problems
All Round 1 Solutions
All Round 2 Problems
All Round 2 Solutions
NACLO 2012 Problems
Name
Solution
Author
Cat and Mouse Story
Solution
Patrick Littell
Learn Yolmo with pleasure
Solution
Lauren Gawne
Interstellar First Contact
Solution
Simon Zwarts, based on work by Kevin Knight
All in the Family
Solution
Dragomir Radev
Traevölörs Freisbuk
Solution
Patrick Littell
Crocodile Bardi
Solution
Catherine Sheard
Haitian Creole
Solution
Ivaylo Youmerski
Waorani Numbers
Solution
Dragomir Radev
The silence of the goats
Solution
Alexey Pegushev
Ik heb voorspeld
Solution
Dick Hudson
A fox among the h
Solution
Pat Littell
Who is good?
Solution
Dick Hudson
The Deschamps Codice
Solution
Alexander Piperski
Waanyi
Solution
Mary Laughren
The Little Engine that Could...Read
Solution
Pat Littell and James Pustejovsky
Jeg kan tælle
Solution
Harold Somers
100 Surnames
Solution
Pat Littell
One, Two, Tree
Solution
Noah Smith, Kevin Gimbel, and Jason Eisner
All Round 1 Problems
All Round 1 Solutions
All Round 2 Problems
All Round 2 Solutions
NACLO 2011 Problems
Name
Solution
Author
Running on MT
Solution
Harold Somers
Mix Up on the Farm
Solution
Lori Levin
The War of the Dots
Solution
Patrick Littell
Double or Quit in Caterpillar Country
Solution
Mark Dras
BrokEnglish!
Solution
Patrick Littell
Tiger Tale
Solution
Dragomir Radev
Ulwa Possessives
Solution
Richard Sproat
Counting in Irish
Solution
Tom Payne
A Large Spoon is Enough
Solution
Harold Somers
Axolotl in the Water
Solution
John Berman
A Script for the Ndyuka
Solution
Patrick Littell
Swallow the Salt
Solution
Bozhidar Bozhanov
Word Salad
Solution
Eric Breck
Stopping and Flapping in Warlpiri
Solution
Mary Laughren
All Round 1 Problems
All Round 1 Solutions
All Round 2 Problems
All Round 2 Solutions
NACLO 2010 Problems
Name
Solution
Author
Gelda's House of Gelbelgarg
Solution
Patrick Littell
Say It in Abma
Solution
Cindy Schneider
Lost in Yerevan
Solution
Dragomir R. Radev
Huevos y Pimientos
Solution
Dragomir R. Radev
Texting, Texting, One Two Three
Solution
Patrick Littell
Türkış Delıt
Solution
Bozhidar Bozhanov
Tangkhul Tangle
Solution
David Mortensen
Ardhay Uzzlepay
Solution
John Henderson with the assistance of Sophie Crouch, University of Western Australia. Based on Crouch (2008, 2009) and data from the MPI EVA Minangkabau corpus
Dogs and cats on trees
Solution
Emily Bender
Plains Cree
Solution
Patrick Littell and Julia Workman
F u cn rd ths
Solution
Richard Sproat
Real Money
Solution
Patrick Littell
No smoke without fire
Solution
Aleka Blackwell
Tale of Kieu
Solution
David Mortensen and Patrick Littell
Possessed in Vanuatu
Solution
Jane Simpson, University of Sydney and Jeremy Hammond, Max Planck Institute for Psycholinguistics
Khipu
Solution
Patrick Littell and Erin Donnelly
All Round 1 Problems
All Solutions
All Round 2 Problems
NACLO 2009 Problems
Name
Solution
Author
Tenji karaoke
Solution
Patrick Littell
Nok-nok!
Solution
Eugene Fink
Letters for Cuzco
Solution
Patrick Littell
You will be laughing
Solution
Bozhidar Bozhanov
Summer Eyes
Solution
Dragomir Radev and Adam Hesterberg
Help my camera!
Solution
Emily Bender
Sk8 Parsr
Solution
Patrick Littell
Linear Combinations
Solution
Richard Sproat
Easy Pieces
Solution
Todor Tchervenkov
Hypo-Hmong-driac
Solution
David Mortensen
The gerbil arrived
Solution
Bozhidar Bozhanov
Yak, Du, Dray
Solution
Dragomir Radev
Orwellspeak
Solution
Jason Eisner
All Round 1 Problems
All Solutions
All Round 2 Problems
NACLO 2008 Problems
Name
Solution
Author
Of monkeys and children
Solution
Ronnie Sim and Thomas Payne
Springing up baby
Solution
Ankit Srivastava and Emily Bender
Reach for the top
Solution
Patrick Littell
Spare the Rod
Solution
Dragomir Radev
A Fish Story
Solution
Patrick Littell
Fakepapershelfmaker
Solution
Willie Costello
Manam, I'm Anam
Solution
Patrick Littell
Thorny Stems
Solution
Eric Breck
aw-TOM-uh-tuh
Solution
Patrick Littell
The Curragh of Kildare
Solution
Todor Tchervenkov
Tzolk'in
Solution
Patrick Littell and Erin Donnelly
The Whole Spectrum
Solution
Adam Hesterberg
All Round 1 Problems
All Round 1 Solutions
All Round 2 Problems
All Round 2 Solutions
NACLO 2007 Problems
Name
Solution
Author
We are all molistic in a way
Solution
Dragomir Radev
Pooh's encyclopedia
Solution
Eugene Fink
A donkey in every house
Solution
Todor Tchervenkov
Hmong
Solution
Ivan Derzhanski
Better sorry than shunk
Solution
Jason Eisner and Roy Tromble
The lost tram
Solution
Boris Iomdin
Rewrite me badd
Solution
Patrick Littell and David Mortensen
This problem is pretty // easy
Solution
Dragomir Radev
All Problems
All Solutions
Student Contributed Problems
Name
Solution
Author
Hebrew
-
Morris Alper
Japanese
-
Morris Alper
Tamil
Solution
Anand Natarajan
Welsh
Solution
Anand Natarajan
Yers
Solutions
Anand Natarajan
More Problems
Narod Practice Problems 1
Narod Practice Problems 2
Want even more practice problems?
          Visit the
Princeton archive
          Or the
International Linguistics Olympiad
Questions about the site? Email gm [at] pangeon [dot] com