May Challenge 2020 Division 1
Triple Sort, Buying a New String, (Challenge) Nanobots, Chef and Bitwise Product, Chef and Rainbow Road, Sorting Vases, Binary Land, Not a Real World Problem
April Cook-Off 2020 Division 2
Tower Counting, Matrix Decomposition, Lift Requests, Simple Operations
April Lunchtime 2020 Division 2
Xor Jar Muluk Tar, Chef in Fantasy League, Positive Mex, Another Birthday Present!, Triangle Query, Dot Time
June Challenge 2020 Division 1
Danya and Different Values, Covid Sampling (Challenge), Perfect Partitions, Convenient Airports, The Delicious Cake, Operations on a Tuple, The Tom and Jerry Game!, Guessing Game
June Lunchtime 2020 Division 1
Maximum AND, Gold Mining, Square Submatrices
RECode 12.0 (Rated for all)
Chef and Or, Chef and Numbers, Chef and Subsequences, Chef and Rotation, Chef and Walk, Chef and String
November Challenge 2020 Division 1
Panic! at the Disco, Chef and the Combination Lock, Restore Sequence, Magical Candy Store, Red-Black Boolean Expression, Scalar Product Tree, Unusual Queries
