August Long Challenge 2017
Chef And Fibonacci Array, Chef and Mover, Palindromic Game, Mathison and the Data Warehouse (Challenge), Greedy Candidates, Strings and Graphs, Chef and Rainbow Array
December Challenge 2018 Division 2
Chef and An Ideal Problem, Chef and Interactive Contests, Chef and Meatballs, Chef and Interactive XOR, Max and Electrical Panel, Colorblind Feast, (Challenge) Delete DAG, Directing Edges
January Challenge 2019 Division 1
A Pizza Slice, (Challenge) Chef and Matching Game, Distinct Pairs, Partition the Graph, Different Neighbours, Yet Another Problem About Sequences
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Yet Another Tree Problem, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance, Maximize the Tax
Australia