October Challenge 2014
Magical Girl and Colored Liquid Potions, Chef and Ground
January Challenge 2015
Chef and Stones, Sereja and Votes
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Let us play with rank list, Chef and Equality
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Chef and Piano Scales
July Challenge 2015
Bread, Chef and Cube, Na2a and lucky stone
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Time measure, Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle
January Long Challenge 2016
Rupsa and the Game, Chef and Time Machine, Churu and Balls
February Challenge 2016
Chef and Strange Operations, Devu and a light discussion, Rectangles of Love, Chef-Detective
March Challenge 2016
Palindromic substrings, maximize the sum
December Challenge 2016
Train Partner, Kirito in labyrinth, Our Base is Under Attack
April Challenge 2017
Dish Of Life, Similar Dishes, Bear and Clique Distances, Bear and Row 01, Chef and Divisor Tree, (CH) Serejs and Billiards
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
October Cook-Off 2017
Chef and Counting Test, Chef and Employment Test, Chef and Weird Queries
India