September Challenge 2015
Count Steps in Matrix, Chain of Doughnuts, Bank robbery
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
August Challenge 2016
Chef and Chocolate, Chef and Round Run
September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
November Challenge 2016
Count Permutations, Gift and Chef, Chef and squares, Task for Alexey
January Challenge 2017
Tourists in Mancunia, Reservior, Chef and Circle, Cats and Dogs, Capital Movement, Digits Cannot Separate
February Challenge 2017
Eugene and big number, Interval Game, Chef and Triangles, Chef and his Best Friend, Chef and His Apartment Dues, Most Frequent Element, Gerrymander
April Challenge 2017
Bear and Row 01, Similar Dishes, Bear and Clique Distances, Dish Of Life, Stable market, Chef and Divisor Tree
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
September Lunchtime 2017
Chef and Dice, Chef and Cook-Off Contests
India