January Challenge 2020 Division 2
Doraemon, Equality, Chefina and Prefix Suffix Sums, Breaking Bricks, Chef and Dynamo
February Challenge 2020 Division 2
Chef and Railway Stations, Expected Change, No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps
June Lunchtime 2020 Division 2
Maximum AND, Increasing Decreasing, Chef and Demonetisation
January Lunchtime 2021 Division 2 (Unrated)
Good Grid, Shifting Spoons, Dreams of Divisibility, Binary Subsequence, Even Differences, Even Sum
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Maximise Function
Japan