October Challenge 2017
A Balanced Contest, Max Mex
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Maximum Remaining, Fencing, Friend or Girlfriend
December Challenge 2019 Division 2
Plus Multiply, That Is My Score!
March Challenge 2020 Division 2
XOR Engine, Pintu and Fruits
April Challenge 2020 Division 2
Strange Number, COVID Pandemic and Long Queue, Sell All the Cars, Unit GCD
May Challenge 2020 Division 2
Triple Sort, Sorting Vases, Coronavirus Spread, Isolation Centers
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Ada King, Missing a Point, Chef and Card Game, Chef and Strings
India