September Challenge 2014
Chef and Rainbow Array - 2, Chef and Left-Right, Chef and sequence, Fun with Rotation
October Challenge 2014
Chef and Ground, Magical Girl and Colored Liquid Potions
November Challenge 2014
Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome
December Challenge 2014
XOR with Subset, Chef and Apple Trees, Alok-nath and His Sanskars, Chef Under Pressure
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
May Challenge 2015
Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe, Chef and Cake
June Challenge 2015
Chef and Polygons, Chef and Memory Limit, Steady tables, Chef and His Friend
July Challenge 2015
Addition and Multiplication, Sereja and Game 2, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles
August Challenge 2015
Chef and insomnia, Aditi and Magic Trick, Cooking Machine, Gravity Guy, Way Out, Devu And Churu
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Spheres, Rupsa and Equilateral Triangle, Who dares to be a millionaire, Count Subarrays, Time measure
December Challenge 2015
Chef and cinema, Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence, Chef and Filters
May Cook-Off 2015
Devu and friendship testing
India