May Challenge 2020 Division 2
Coronavirus Spread, Chef and Bitwise Product, Isolation Centers, Triple Sort
March Cook-Off 2020 Division 2
Find Your Gift, Box of Chocolates
April Cook-Off 2020 Division 2
Matrix Decomposition, Lift Requests
May Lunchtime 2020 Division 2
Weird Walk, Lost Weekends
August Cook-Off 2020 Division 2
Polygon Relationship, Chef and Work, K-Foldable String
June Lunchtime 2020 Division 2
Chef and Demonetisation, Increasing Decreasing
RECode 12.0 (Rated for all)
Chef and String, Chef and Numbers
December Challenge 2020 Division 2
Vaccine Distribution, Vaccine Production, Even Pair Sum, String Operations, Square Root of LCA Convolution, Hail XOR, Positive Prefixes
January Cook-Off 2021 Division 2
Prime Tuples, Maximise Islands
December Lunchtime 2020 Division 1 (Unrated)
Three Letters, One Zero Swaps
October Cook-Off 2020 Division 2
Split the Str Ing, Decreasing Srrnmieeda, Path-etic Sums, Yet Another Crossover Episode
September Cook-Off 2020 Division 2
Bowling Strategy, Maximise Subsequence Value, Bulbs and Wires
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Multiple Games, XOR Sums, Maximise Function
March Cook-Off 2021 Division 2
Consecutive Deletions, Guess the Number, Matrix XOR
March Lunchtime 2021 Division 2
Dinner by Candlelight, Racing, Lunchtime
May Lunchtime 2021 Division 2
Charges, Tom And Jerry 1, Total Components
United States