December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem, Max and Electrical Panel
November Challenge 2018 Division 2
Chef and Difficult 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 Challenge 2019 Division 2
Manhattan Rectangle, Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars, Guess It Right
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Friend or Girlfriend, Fencing, Maximum Remaining
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Guddu on a Date, Chef and Ingredients, Sum and GCD
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean , Circular Merging, Parity Again, Guess the Prime!
August Challenge 2019 Division 1
Guddu and his Mother, Dilemma, Maximize an Expression
November Challenge 2019 Division 1
Physical Exercise, From Zero to Infinity
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, English
India