November Challenge 2018 Division 2
Appy Loves One, Good Median, Chef, Primes and Trees (Challenge), Chef and Difficult Contests, Chef and Happiness, Chef and Ridges
January Challenge 2019 Division 2
(Challenge) Chef and Matching Game, A Pizza Slice, Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Lucky Number Game, Different Neighbours, Yet Another Problem About Sequences
February Cook-Off 2019 Division 1
Max Range Queries, Chef and Secret Password, Chef and Party
March Lunchtime 2019 Division 1
Corrupted Seven-Segment Display, Partition into Permutations
April Challenge 2020 Division 1
Strange Number, Squared Subsequences, Factor Tree, Leaked Answers (Challenge)
