December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
November Challenge 2018 Division 2
Chef and Difficult Contests, Chef and Happiness, Chef and Ridges
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
January Challenge 2019 Division 2
Distinct Pairs, Fancy Quotes, Lucky Number Game, Different Neighbours
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
August Challenge 2020 Division 2
Chef and Linear Chess, Another Card Game Problem, Chef Wars - Return of the Jedi
September Challenge 2020 Division 2
Chefina and Swap, A Problem on Sticks, Ada Matrix, Coronavirus Spread 2
October Challenge 2020 Division 2
Positive AND, Covid Run, Chef and Easy Queries
September Lunchtime 2020 Division 2
Watermelon, GCD operations
January Challenge 2021 Division 3
Fair Elections, Chef and Division 3, Point Of Impact, Encoded String
February Challenge 2021 Division 3
Chef and Meetings, Maximise Function, Highest Divisor
March Challenge 2021 Division 3
Chef and Groups, No Time to Wait
India