September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
March Challenge 2018 DIV 2
Minions and Voting, Minion Chef and Bananas, Chef and Glove, Mix the Colors, A Big Sale, Chef and Easy Problem
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Judges a Competition
August Challenge 2018 Division 2
Coordinate Compression , Modular GCD, Problem Sort, Sheokand and Number, Spell Bob
October Challenge 2018 Division 2
Appy and Balloons , Chef and Serves, Byte to Bit, Chef and Circles
India