July Challenge 2019 Division 2
Hit the Coconuts, Guess the Prime!, Parity Again, Codechef War, Circular Merging, (Challenge) Codechef War II, Minimum and Maximum, Chef and Mean
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
China