September Challenge 2017
Minimum Good Permutation, Chef and Pick Digit, Little Chef and Sums
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
February Challenge 2018
Car-pal Tunnel, Permutation and Palindrome, Chef And The Patents, Chef And His Characters
March Challenge 2018 DIV 2
Chef and Easy Problem, A Big Sale, Mix the Colors, Chef and Glove, Minions and Voting, Minion Chef and Bananas
May Challenge 2018 Division 2
Dibs on Fibs, Fake Binary Search, Xor Again, Mighty Friend, Minimum Deletions
January Challenge 2019 Division 2
Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes
April Cook-Off 2019 Division 2
Pied Piper vs Hooli, Making a Meal, Chef Learning Hungarian Algorithm
August Challenge 2019 Division 2
Guddu and his Mother, Zombie and the Caves, Distribute Apples, Football, Dilemma
Alkhwarizm (Rated for all)
Weirwood Trees, Danny Wants To Know
February Challenge 2020 Division 2
No Change Required, The Theatre Problem, School of Geometry, Hard Cash, Long Contest and Cook Off Overlaps
