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
Bear and Row 01, Similar Dishes
July Challenge 2017
Chef and Sign Sequences, Whats in the Name
August Long Challenge 2017
Palindromic Game, Greedy Candidates, Chef and Rainbow Array
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
February Challenge 2018
Chef And His Characters, Chef And The Patents
India