September Challenge 2017
Chef and Pick Digit, Little Chef and Sums
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
September Cook-Off 2017
Statistics Construction, Subsequence Equality
October Cook-Off 2017
Chef and Employment Test, Chef and Weird Queries
September Lunchtime 2017
Chef and Cook-Off Contests
March Challenge 2018 DIV 2
Mix the Colors, Chef and Glove, Minion Chef and Bananas, A Big Sale
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Judges a Competition
March Lunchtime 2018 Division 2 (Unrated)
Chef and Friends, Magic Elements, Three Integers
April Challenge 2018 Division 2
Average of Pairs, Workers
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again
India