September Challenge 2014
Chef and Rainbow Array - 2, Chef and Left-Right, Fun with Rotation, Factorisation
October Challenge 2014
Remy paints the fence, Chef and Ground, Chef and Painting, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
November Challenge 2014
Let us construct palindrome, Chef and Red Black Tree, Distinct Characters Subsequence, Chef and Segment Game
January Challenge 2015
Chef and Stones, Sereja and Votes
January Cook-Off 2015
Suraj goes shopping, Tojo hates probabilities
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Let us play with rank list, Chef and Equality
March Challenge 2015
Sign Wave, Devu and his Class, Count Substrings, Chef and Notebooks
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Division of Lands, Chef and Piano Scales
August Challenge 2015
Way Out, Gravity Guy, Devu And Churu , Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Count Steps in Matrix, Cracking the Code, Lighthouses, Bank robbery, Chain of Doughnuts
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Cyclic shifts in permutation, Rupsa and Equilateral Triangle
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
September Mega Cook-Off 2015
Forgotten Language, Stacks
India