December Lunchtime 2020 Division 2 (Unrated)
Sed Sequences, Horoscope Matrix, One Zero Swaps, Three Letters
January Lunchtime 2021 Division 2 (Unrated)
Good Grid, Shifting Spoons, Dreams of Divisibility, Binary Subsequence, Even Differences, Even Sum
January Cook-Off 2021 Division 3
Prime Tuples, Password, Distinct Pair Sums, Not Too Colourful, Mex Subsequence
April Lunchtime 2021 Division 2
A Special Tree, Chef in Heaven , Bench Press, Array Rotation
October Lunchtime 2021 Division 2
Median Rearrangement, Chef and Water Car, Exactly N plus 1 Values, Maximum GCD
May Cook-Off 2022 Division 1 (Rated)
Different Subarrays Rearrange, Triple Inversions
Singapore