December Challenge 2019 Division 2
That Is My Score!, Plus Multiply
January Challenge 2020 Division 2
Chef and Dynamo, Doraemon, Breaking Bricks
February Challenge 2020 Division 2
Chef and Railway Stations, No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps
April Challenge 2020 Division 2
Strange Number, COVID Pandemic and Long Queue, Leaked Answers (Challenge), Sell All the Cars, Unit GCD, Ready Bitwise, Squared Subsequences
May Challenge 2020 Division 2
Triple Sort, Coronavirus Spread, Isolation Centers
June Challenge 2020 Division 2
Chef and Price Control, The Tom and Jerry Game!, Chef and String, Chef and Icecream, Even Matrix, Covid Sampling (Challenge)
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
September Challenge 2020 Division 2
Chef and Trump Cards, Coronavirus Spread 2, Ada Matrix, Find XOR, A Problem on Sticks, Chefina and Swap
February Challenge 2021 Division 2
Frog Sort, Team Name, Another Tree with Number Theory, Prime Game, Multiple Games, XOR Sums, Maximise Function
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