December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
January Challenge 2019 Division 2
Fancy Quotes, Lucky Number Game
February Challenge 2019 Division 2
Manhattan Rectangle, Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Art of Balance, Deputy Chef
March Challenge 2019 Division 2
Chef and a Beautiful Digit, Chef and Number Game, Chef got Recipes
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Guddu on a Date, Chef and Ingredients, Sum and GCD
June Lunchtime 2019 Division 2
Magda and Silly Pairs, Ping Paja Pong
July Challenge 2019 Division 2
Parity Again, Minimum and Maximum, Chef and Mean
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples, Zombie and the Caves
January Challenge 2020 Division 2
Chef and Dynamo, Equality, Breaking Bricks
April Challenge 2020 Division 2
Strange Number, COVID Pandemic and Long Queue, Sell All the Cars, Unit GCD
October Challenge 2020 Division 2
Positive AND, Covid Run, Chef and Easy Queries
January Cook-Off 2021 Division 3
Prime Tuples, Distinct Pair Sums, Maximise Islands, Password
India