May Challenge 2020 Division 2
Sorting Vases, Coronavirus Spread, Chef and Bitwise Product, Isolation Centers, Triple Sort
May Lunchtime 2020 Division 2
Weird Walk, Lost Weekends
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Operations on a Tuple, Chef and Icecream, Chef and String, Chef and Price Control
July Challenge 2020 Division 2
Ada King, Chef and Strings, Chef and Card Game, Doctor Chef, Missing a Point, Chefina and Swaps
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Multiple Games, Maximise Function
India