July Challenge 2020 Division 2
Chefina and Swaps, Ada King, Chef and Strings, Chef and Card Game, Missing a Point, Doctor Chef
August Challenge 2020 Division 2
Chef Wars - Return of the Jedi, Another Card Game Problem, Chef and Linear Chess, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 2
A Problem on Sticks, Ada Matrix, Chefina and Swap
October Challenge 2020 Division 2
Positive AND, Replace for X, D-Dimensional MST, Adding Squares, Covid Run, Chef and Easy Queries
November Challenge 2020 Division 1
Magical Candy Store, Restore Sequence
January Challenge 2021 Division 2
Watching CPL, Fair Elections
December Challenge 2020 Division 1
Hail XOR, Positive Prefixes, Even Pair Sum
February Challenge 2021 Division 2
Prime Game, Highest Divisor, Maximise Function, Multiple Games, Another Tree with Number Theory, Team Name, Frog Sort
April Challenge 2021 Division 2
Binary String MEX, Worthy Matrix, Chef and Dice, Valid Pair, World Record, Strong Language, Boolean Game
India