July Challenge 2020 Division 2
Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings, Ada King
August Challenge 2020 Division 2
Insanely Hard School Exams, Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Find XOR, Ada Matrix, Chef and Trump Cards, Chefina and Swap
Coders' Legacy (Rated for all)
Chef vs Doof, Doof on Cartesian, Doof fires Brackets
March Challenge 2021 Division 2
Interesting XOR!, Dense Graph, College Life 4, Consecutive Adding, Paparazzi Gennady, Space Arrays, Wireless Electricity (Challenge), Maximum Topological Sort
India