September Challenge 2017
Little Chef and Sums, Minimum Good Permutation
January Lunchtime 2018
Chef and Game with Sequence
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome
March Challenge 2018 DIV 2
Minion Chef and Bananas, Minions and Voting, Mix the Colors, A Big Sale, Chef and Glove
August Challenge 2018 Division 2
Modular GCD, Problem Sort, Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
Magician versus Chef, Bad Shuffle, Table Game, Chef and Adventures, Chef and Condition Zero (Challenge), War of XORs
December Challenge 2018 Division 1
Max and Electrical Panel, Chef and Interactive XOR
November Challenge 2018 Division 1
Appy Loves One, Chef and Difficult Contests
India