September Challenge 2017
Chef and Pick Digit, Little Chef and Sums, Minimum Good Permutation
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle
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, Chef and Glove, Mix the Colors, A Big Sale
August Challenge 2018 Division 2
Modular GCD, Problem Sort, Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
November Challenge 2018 Division 2
Chef and Difficult Contests
October Challenge 2018 Division 2
Minimize Digitsum, Chef and Serves, Byte to Bit, Chef and Circles
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