August Challenge 2014
The Leaking Robot, Chef and Gift
September Challenge 2014
Chef and Rainbow Array - 2, Chef and Left-Right, Fun with Rotation
November Challenge 2014
Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, The Spelling Problem
February Challenge 2015
Chef and Strange Formula, Chef and Equality, Let us play with rank list, Chef and Chain
March Challenge 2015
Chef and Notebooks, Devu and his Class, Sign Wave
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Chef and Piano Scales
May Challenge 2015
Chef and new recipe, Chef and Prime Divisors, Devu and binary String, Set Difference
June Challenge 2015
Chef and His Friend, Chef and Memory Limit, Chef and Polygons
August Challenge 2015
Gravity Guy, Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Cracking the Code, Lighthouses, Bank robbery, Count Steps in Matrix, Chain of Doughnuts
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
July Lunchtime 2015
Greedy puppy, Puppy and game
India