September Challenge 2018 Division 2
Chef and Adventures, Magician versus Chef
December Challenge 2018 Division 2
Max and Electrical Panel, Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Chef and Difficult Contests, Chef and Happiness
February Challenge 2019 Division 2
Chef and Magical Jars, Deputy Chef, Art of Balance, Appy and Contest, Chef and Secret Ingredients, Manhattan Rectangle
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Fencing, Subtree Removal, Friend or Girlfriend, Playing with Numbers, Maximum Remaining
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Intersecting Paths, Sum and GCD
July Challenge 2019 Division 1
Hit the Coconuts, Guess the Prime!, Codechef War, Circular Merging
September Challenge 2019 Division 1
Biladerim Icin, Chef Designed a Network, Fuzzy Linear Combinations
February Challenge 2020 Division 1
Chef and Railway Stations, No Change Required, Long Contest and Cook Off Overlaps
August Lunchtime 2020 Division 1
Game on a Strip, Counting Graphs, Alien Invasion
December Lunchtime 2020 Division 1 (Unrated)
Three Letters, One Zero Swaps
India