December Challenge 2018 Division 2
Max and Electrical Panel, Directing Edges, Chef and Interactive XOR, Chef and Meatballs, Chef and Interactive Contests, Chef and An Ideal Problem, (Challenge) Delete DAG
November Challenge 2018 Division 2
Chef and Ridges, Magician versus Chef 2
January Challenge 2019 Division 2
Fancy Quotes, A Pizza Slice, (Challenge) Chef and Matching Game, Chef and Modulo Game, Distinct Pairs, Lucky Number Game, Different Neighbours, Yet Another Problem About Sequences
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Maximize the Tax
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, Chefina and Prefix Suffix Sums, English
