January Challenge 2020 Division 2
Equality, Chef and Dynamo, Breaking Bricks
February Challenge 2020 Division 2
School of Geometry, Hard Cash
March Challenge 2020 Division 2
XOR Engine, Ada Bishop 2, Pintu and Fruits
April Challenge 2020 Division 2
Strange Number, Squared Subsequences, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue
March Cook-Off 2020 Division 2
Mysterious Sequence, Find Your Gift, Box of Chocolates
January Lunchtime 2020 Division 2
Chef and Street Food, Bob and His Friends
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
August Challenge 2020 Division 2
Another Card Game Problem, Chef and Wedding Arrangements, Smallest KMP, Chef and Linear Chess, Chef Wars - Return of the Jedi, Insanely Hard School Exams
January Challenge 2021 Division 2
Watching CPL, Fair Elections
December Challenge 2020 Division 1
Hail XOR, Positive Prefixes, Even Pair Sum
India