May Challenge 2017
Chef and his daily routine, Courses in an university
February Challenge 2018
Chef And His Characters, Chef And The Patents
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
February Challenge 2019 Division 2
Chef and Secret Ingredients, Deputy Chef
July Challenge 2020 Division 2
Ada King, Chef and Card Game, Chef and Strings
January Challenge 2021 Division 3
Chef and Division 3, Encoded String
July Challenge 2021 Division 3 (Rated)
Maximum Production, Relativity
Australia