July Challenge 2015
Bread, Chef and Cube, Na2a and lucky stone
August Challenge 2015
Way Out, Gravity Guy, Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
December Challenge 2015
Chef and the stones, Oracle Devu and Longest Common Subsequence
July Cook-Off 2015
Cops and the Thief Devu, Maximize Disjoint Pair Sum
September Lunchtime 2015
Sum of palindromic numbers
April Challenge 2016
Chef and Ballons, Chef And Magical Path, Chef And Coloring
June Challenge 2016
Chef And Binary Operation, Devu and an Array, Chef and Coins Game, Chef and Array and K, Chef And The Hiring Event
July Challenge 2016
Andrash and Stipendium, Chef and Tetris, Chef and Robots Competition, Chefland and Electricity
August Challenge 2016
Chef and Circle Run, Chef and Round Run, Chef and Chocolate
September Challenge 2016
Chef and Friends, Dividing Machine, Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Sereja and Progressions, Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs, Chef and Two String
August Cook-Off 2016
Tweedle-Dee and Tweedle-Dum
October Cook-Off 2016
Watson asks Does Permutation Exist, ChefWatson uses Social Network
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
India