September Lunchtime 2019 Division 2
Chef Feeds Cats, Chef and Football Match
October Challenge 2019 Division 2
Even Edges, Missing Number, Chef and Maximum Star Value, Array Modification, (Challenge) Maximizing LIS, Operations on a Matrix, Phone Prices
November Challenge 2019 Division 2
Chef and Minimum Colouring, Weapon Value, Hard Sequence, Physical Exercise, A Simple Game
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Sticky Notes, Addition
February Challenge 2020 Division 2
No Change Required, Long Contest and Cook Off Overlaps, (Challenge) Raisins, Hard Cash, School of Geometry, The Theatre Problem, Chef and Railway Stations
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Ready Bitwise, Leaked Answers (Challenge)
India