September Challenge 2015
Nikitosh and xor, Count Steps in Matrix, Bank robbery, Cracking the Code, Chain of Doughnuts
October Challenge 2015
Count Subarrays, Who dares to be a millionaire, Spheres, Rupsa and Equilateral Triangle
November Challenge 2015
Eugene and function, Simple Sum, Chef and cakes
August Lunchtime 2015
Churu and lost string, Minimum Maximum
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
September Challenge 2016
Chef and calculation, JosephLand, Faded Palindromes, Chef and Matrix Division, Dividing Machine, Chef and Friends, Chef and digits of a number
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number
April Challenge 2017
Bear and Random Grid, Similar Dishes, Bear and Clique Distances, Bear and Row 01, Dish Of Life, Stable market
August Long Challenge 2017
Strings and Graphs, Chef And Fibonacci Array, Greedy Candidates, Palindromic Game, Chef and Mover, Chef and Rainbow Array
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
August Lunchtime 2017
Mathison and the Dynamo shuffle, Mathison and pangrams
September Lunchtime 2017
Chef and Cook-Off Contests
February Challenge 2019 Division 1
Manhattan Rectangle, Chef and Secret Ingredients, Art of Balance
India