December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Difficult Contests
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
June Challenge 2019 Division 2
Guddu on a Date, Chef and Proxy, Road Signs
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples, Zombie and the Caves
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Chef and Interesting Subsequences
October Challenge 2019 Division 2
Phone Prices, Operations on a Matrix, Array Modification
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Equality, Breaking Bricks
February Challenge 2020 Division 2
No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps
July Challenge 2020 Division 2
Chefina and Swaps, Chef and Strings, Chef and Card Game, Doctor Chef, Missing a Point, Chef and Dragon Dens, Ada King
December Challenge 2020 Division 1
Hail XOR, Calculus, String Operations, Positive Prefixes, Even Pair Sum
India