September Challenge 2016
Chef and digits of a number
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
June Challenge 2017
A Good Set, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
February Challenge 2018
Chef And His Characters, Chef And The Patents
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again
Code Melange (Rated)
The Deadly Sin, Candy Love
Bangladesh