March Cook-off 2018 Division 2
Chef Restores a Matrix, Chef Judges a Competition, Chef Goes to the Cinema
August Cook-Off 2018 Division 1
GukiZ and Candies, Mixi Game
October Mega Cook-Off 2018 Division 1
Binary Nim 2, Pumping Water
May Challenge 2018 Division 2
Dibs on Fibs, Fake Binary Search, Xor Again, Minimum Deletions, Mighty Friend
June Challenge 2018 Division 2
Binary Shuffle, Naive Chef
July Challenge 2018 Division 2
Reach Equilibrium, No Minimum No Maximum, Gears, Magic Set, Strike or Spare, No Strings Attached
September Challenge 2018 Division 2
Magician versus Chef, Bad Shuffle, Table Game, War of XORs, Sasha and Photos, Chef and Adventures
December Challenge 2018 Division 2
(Challenge) Delete DAG, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR, Chef and Meatballs, Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 1
Good Median, Appy Loves One
October Challenge 2018 Division 1
Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Perfect Power Divisors, Ready Bitwise, Factor Tree, Leaked Answers (Challenge)
India