January Challenge 2013
The Minimum Number Of Moves, Chef of the Year, Three Different Numbers
February 2013 Challenge
Little Elephant and Cards, Buy1-Get1, Climbing Stairs, Efficient Painting
March Challenge 2013
Tourist Translations, Approximately, Fire Escape Routes, Minesweeper
April Challenge 2013
Barcelona Gameplay Tactics, Maximum Weight Difference, Levy Conjecture
