February Challenge 2015
Let us play with rank list, Chef and Chain
August Challenge 2015
Gravity Guy, Cooking Machine, Aditi and Magic Trick, Way Out
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix, Bank robbery, Lighthouses, Cracking the Code
October Challenge 2015
Count Subarrays, Rupsa and Equilateral Triangle, Who dares to be a millionaire, Time measure
December Challenge 2015
Chef and the stones, Plane Division, Oracle Devu and Longest Common Subsequence
August Cook-Off 2015
Chef and the XORed Number , Chef and the Wildcard Matching
January Long Challenge 2016
Devu and Perfume, Chef and Time Machine, Churu and Balls, Rupsa and the Game, Sereja and Salesman, Chef and Making Triples
February Challenge 2016
Chef and Strange Operations, Chef-Detective
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
June Challenge 2016
Chef and Array and K, Devu and an Array, Chef and Coins Game, Chef And Binary Operation, Chef And The Hiring Event
September Challenge 2016
Chef and digits of a number, Faded Palindromes
India