September Challenge 2017
Little Chef and Sums, Minimum Good Permutation
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
March Cook-off 2018 Division 2
Chef Restores a Matrix, Chef Judges a Competition, Chef Goes to the Cinema
September Mega Cook-Off 2018 Division 2
OneTwo, ATM Machine, Make a Permutation
June Challenge 2018 Division 2
Binary Shuffle, Naive Chef
July Challenge 2018 Division 2
Magic Set, Strike or Spare
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
Code Melange (Rated)
XD Subsequences, Candy Love, The Deadly Sin
May Challenge 2019 Division 2
Matches, Reduce to One, Where to Build the Roads
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Lent Money, Guddu on a Date, Chef and Ingredients, Chef and His Dish, Intersecting Paths, Sum and GCD
August Challenge 2019 Division 1
Guddu and his Mother, Maximize an Expression, Dilemma, Encoding
November Challenge 2019 Division 1
Physical Exercise, Smallest Beautiful Number, From Zero to Infinity, A Simple Game, Single Point of Failure
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, Chefina and Prefix Suffix Sums
India