January Challenge 2018
Maximum Score, K-Concatenation, Rectangle
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
March Challenge 2018 DIV 2
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
April Cook-off 2018 Division 2
Cut the Board, Binary Nim
July Cook-Off 2018 Division 2
Encoding Message, OR Matrix
August Cook-Off 2018 Division 2
Mixi Game, Balsa For The Three
October Mega Cook-Off 2018 Division 2
Binary Nim 2, Ada and the Staircase
April Challenge 2018 Division 2
Weight of Numbers, Workers
July Challenge 2018 Division 2
Magic Set, Strike or Spare
Encoder (Rated for Division 2)
Second Largest Element, Paint the Wall, Knight Chess
December Lunchtime 2018 Division 2
Print Pattern, Choosing from Buckets, Age Calculator
March Challenge 2019 Division 2
Chef and Number Game, Chef and a Beautiful Digit
India