December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Difficult Contests
January Challenge 2019 Division 2
Distinct Pairs, Fancy Quotes
February Challenge 2019 Division 2
Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game
April Challenge 2020 Division 2
Sell All the Cars, COVID Pandemic and Long Queue
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
April Challenge 2021 Division 3
Valid Pair, World Record, Strong Language
India