January Challenge 2018
Maximum Score, Rectangle, K-Concatenation
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
March Challenge 2018 DIV 2
Chef and Glove, Minions and Voting, Mix the Colors, A Big Sale, Chef and Easy Problem
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again, Dibs on Fibs
June Challenge 2018 Division 2
Vision, Naive Chef, Sheokand and String, Binary Shuffle
January Challenge 2019 Division 2
A Pizza Slice, Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Lucky Number Game, Different Neighbours, Yet Another Problem About Sequences
February Challenge 2019 Division 2
Manhattan Rectangle, Guess It Right, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Deputy Chef
India