September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
October Challenge 2016
Chef and Keyboard, Fenwick Iterations, 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, Similar Dishes
June Challenge 2017
A Good Set, Pairwise union of sets, Triplets, Xenny and Coin Rankings, Chef and the Feast
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
India