December Challenge 2012
Granama Recipes, Arigeom Beats, Book Exercises, Magic Rankings, The Uncountable Ways, Pizza Delivery, Sereja and Data Structures
January Challenge 2013
End Of The World, Three Different Numbers, Chef of the Year, A Fence for Byteland, The Minimum Number Of Moves, Hotel Balifornia, Dividing Products, Little Elephant and Alcohol
February 2013 Challenge
Little Elephant and Cards, Buy1-Get1, Magic Board, Climbing Stairs
April Challenge 2013
Cylinder, Levy Conjecture, Maximum Weight Difference, Fault Tolerance, ChefGame, Barcelona Gameplay Tactics, Little Elephant and Music, Kingdom Unity
May Challenge 2013
Juno Puzzle for May, Field Trip, Your Name is Mine, Name Reduction, Password Cracking Challenge, Queries on tree again!, Tree Counting, Witua and Math, Matchsticks
June Challenge 2013
Collecting Magical Berries, Lapindromes, W String, To challenge or not, Predictopus, Two k-Convex Polygons, Dessert Wizard, Just Some Permutations 3, Little Elephant and Mouses
September Challenge 2013
Little Elephant and Exams, Cool Guys, Chef and Integers , Project Spoon, CAO Stage-1, CAO Stage-2
Israel