September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
January Challenge 2019 Division 2
Lucky Number Game, Distinct Pairs, Chef and Modulo Game
February Challenge 2019 Division 2
Chef and Secret Ingredients, Deputy Chef, Art of Balance, Appy and Contest, Chef and Magical Jars, Guess It Right, Manhattan Rectangle
February Lunchtime 2019 Division 2
Average Number, The Tricky Deal
August Challenge 2020 Division 2
Chef and Wedding Arrangements
December Challenge 2020 Division 2
Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution
India