July Challenge 2015
Chef and Cube, Na2a and lucky stone
August Challenge 2015
Cooking Machine, Aditi and Magic Trick, Gravity Guy
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
May Cook-Off 2015
Devu and friendship testing
October Cook-Off 2015
Almost Sorted Permutation
January Long Challenge 2016
Churu and Balls, Devu and Perfume, Chef and Time Machine, Rupsa and the Game
February Challenge 2016
Chef and Strange Operations, Devu and a light discussion, Chef-Detective
March Challenge 2016
Palindromic substrings, Chef and Number Guessing, maximize the sum, Chef And Special Dishes
April Challenge 2016
Chef And Coloring, Chef and Ballons, Help Watson Escape, Chef And Magical Path
June Challenge 2016
Chef And The Hiring Event, Chef and Rectangle Array, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
July Challenge 2016
Chefland and Electricity, Chef and Robots Competition, Chef and Tetris, Chef and Segments, Andrash and Stipendium
July Cook-Off 2016
Chef and Proportion, Chef and Numbers
June Lunchtime 2016
Collisions, One more weird game
October Challenge 2017
Max Mex, A Balanced Contest
India