December Challenge 2018 Division 2
Chef and Interactive XOR, Max and Electrical Panel, Chef and An Ideal Problem, Chef and Meatballs, Chef and Interactive Contests
January Challenge 2019 Division 2
Yet Another Problem About Sequences, Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, A Pizza Slice
February Cook-Off 2019 Division 2
Chef and Party, Buying New Tablet, Chef and Secret Password
July Challenge 2019 Division 2
Guess the Prime!, Parity Again, Minimum and Maximum, Chef and Mean
August Challenge 2019 Division 2
Guddu and his Mother, Dilemma, Football, Distribute Apples, Zombie and the Caves
October Challenge 2019 Division 2
Phone Prices, Operations on a Matrix, Chef and Maximum Star Value, Missing Number, Even Edges, Array Modification
November Challenge 2019 Division 2
Physical Exercise, Hard Sequence, Weapon Value, Chef and Minimum Colouring
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon
September Challenge 2020 Division 2
Chef and Trump Cards, Coronavirus Spread 2, Ada Matrix, Find XOR, A Problem on Sticks, Chefina and Swap
April Cook-Off 2021 Division 2
OR of ANDs, Chocolate Monger
April Lunchtime 2021 Division 2
Chef in Heaven , Bench Press, Array Rotation
May Lunchtime 2021 Division 2
Charges, Tom And Jerry 1, Total Components
India