December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
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
Guess the Prime!, Chef and Mean , Minimum and Maximum, Parity Again
August Challenge 2019 Division 2
Guddu and his Mother, Dilemma, Football, Distribute Apples, Zombie and the Caves
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Sticky Notes, Addition
India