March Challenge 2018 DIV 2
Chef and Glove, A Big Sale
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Chef, Primes and Trees (Challenge), Chef and Difficult Contests, Chef and Happiness
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef and Number Game, Chef and a Beautiful Digit, (Challenge) Interleaving Strings
March Lunchtime 2019 Division 2
Corrupted Seven-Segment Display, Pogo Stick Competition, Testing Robot
August Challenge 2019 Division 1
Guddu and his Mother, Dilemma, Maximize an Expression
September Challenge 2019 Division 1
Fuzzy Linear Combinations, Chef Designed a Network
December Challenge 2019 Division 1
That Is My Score!, Easy Subsequence Selection, Binary XOR, Plus Multiply
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Ready Bitwise, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue
India