May Challenge 2020 Division 2
Coronavirus Spread, Triple Sort, Isolation Centers
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Operations on a Tuple, Chef and Icecream, Covid Sampling (Challenge), Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Missing a Point, Doctor Chef
August Challenge 2020 Division 2
Chef and Wedding Arrangements, Smallest KMP, Chef and Linear Chess, Chef Wars - Return of the Jedi, Insanely Hard School Exams, Another Card Game Problem
September Challenge 2020 Division 1
Chefina and Swap, Chef and Trump Cards, Find XOR, Ada Matrix
June Lunchtime 2020 Division 2
Increasing Decreasing, Chef and Demonetisation
October Challenge 2020 Division 1
Positive AND, Replace for X
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Maximise Function
India