October Challenge 2014
Magical Girl and Colored Liquid Potions, Chef and Ground
November Challenge 2014
Distinct Characters Subsequence
January Challenge 2015
Chef and Stones, Sereja and Votes
February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
March Challenge 2015
Sign Wave, Chef and Notebooks
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Division of Lands, Chef and Piano Scales
May Challenge 2015
Chef and Prime Divisors, Set Difference , Chef and new recipe
June Challenge 2015
Chef and Polygons, Chef and Memory Limit, Chef and His Friend
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
October Challenge 2015
Rupsa and Equilateral Triangle, Who dares to be a millionaire, Count Subarrays, Time measure
May Cook-Off 2015
Devu and friendship testing
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
July Lunchtime 2015
Greedy puppy, Puppy and game
September Lunchtime 2015
Sum of palindromic numbers
India