December Challenge 2018 Division 2
Chef and Interactive XOR, Max and Electrical Panel, Chef and An Ideal Problem, Chef and Interactive Contests, Chef and Meatballs
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
Deputy Chef, Art of Balance, Chef and Secret Ingredients, Appy and Contest, Chef and Magical Jars, Manhattan Rectangle
May Challenge 2019 Division 2
Matches, Reduce to One, Where to Build the Roads
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Lent Money, Guddu on a Date, Chef and Ingredients, Sum and GCD
July Challenge 2019 Division 1
Hit the Coconuts, Guess the Prime!, Codechef War, Circular Merging
India