December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples
February Challenge 2020 Division 2
School of Geometry, Hard Cash
April Challenge 2020 Division 2
Strange Number, Unit GCD, Sell All the Cars, COVID Pandemic and Long Queue
May Challenge 2020 Division 2
Coronavirus Spread, Isolation Centers
April Lunchtime 2020 Division 2
Another Birthday Present!, Chef in Fantasy League
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Covid Sampling (Challenge), Chef and String, Chef and Price Control
June Lunchtime 2020 Division 2
Maximum AND, Chef and Demonetisation, Increasing Decreasing
India