September Challenge 2018 Division 2
Table Game, Bad Shuffle, Chef and Adventures, Chef and Condition Zero (Challenge), War of XORs, Magician versus Chef, Sasha and Photos, AND Square Subsegments
December Challenge 2018 Division 1
(Challenge) Delete DAG, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR
October Challenge 2018 Division 2
Chef and Circles, Byte to Bit, Chef and Serves, Minimize Digitsum, Beautiful Bricks, Appy and Balloons , Chef and Surprise Chessboard
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Partition the Graph, Distinct Pairs, A Pizza Slice
May Challenge 2019 Division 1
Ada Rooks 2, Where to Build the Roads
August Challenge 2019 Division 1
Encoding, Zombie and the Caves, Distribute Apples, Football, Chef and Gordon Ramsay, Maximize an Expression, Dilemma, Guddu and his Mother
August Challenge 2020 Division 1
Subsequence Frequency Counting, Chefina and Strange Tree, Smallest KMP, Chef Thanos Wants Perfect Balance, Chef and Wedding Arrangements
India