September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
July Challenge 2017
Chef and Sign Sequences, IPC Trainers, Whats in the Name, Calculator
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs
September Challenge 2017
Little Chef and Sums, Fill The Matrix, Minimum Good Permutation, Chef and Pick Digit
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function, Chang and Perfect Quadruples
June Challenge 2018 Division 2
Binary Shuffle, Naive Chef
India