February Challenge 2017
Chef and His Apartment Dues
June Challenge 2017
Xenny and Coin Rankings, A Good Set
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates
September Challenge 2017
Fill The Matrix, Little Chef and Sums, Minimum Good Permutation, Chef and Pick Digit
October Challenge 2017
Chef and Magic Arrays, Chef and a great voluntary Program, Chef and Cycled Cycles, Max Mex, Counter Test For CHEFSUM, A Balanced Contest, (Challenge) Connecting computers
November Challenge 2017
Villages and Tribes, Periodic Palindrome Construction, Chef Hates Palindromes, Chef goes Left Right Left
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out
February Challenge 2018
Chef And His Characters, Chef And The Patents
March Challenge 2018 DIV 2
A Big Sale, Chef and Glove
April Challenge 2018 Division 2
Weight of Numbers, Highway Crossing, Count Good Prefixes, Workers
September Challenge 2018 Division 2
Magician versus Chef, Chef and Adventures
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid
