February Challenge 2017
Chef and His Apartment Dues
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
April Challenge 2017
Similar Dishes, Bear and Row 01
May Challenge 2017
Chef and his daily routine, Courses in an university
June Challenge 2017
A Good Set, Xenny and Coin Rankings, Pairwise union of sets
August Long Challenge 2017
Greedy Candidates, Palindromic Game, Chef and Mover, Chef and Rainbow Array
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, A Balanced Contest
August Cook-Off 2017
Real obtuse, From heaven to earth
March Cook-off 2018 Division 2
Chef Judges a Competition
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures, Table Game, Bad Shuffle
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid
February Challenge 2019 Division 2
Manhattan Rectangle, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
April Cook-Off 2019 Division 2
Making a Meal, Chef Learning Hungarian Algorithm
India