December Challenge 2019 Division 2
Binary XOR, Easy Subsequence Selection, That Is My Score!, Addition, Plus Multiply
February Challenge 2020 Division 2
No Change Required, The Theatre Problem, School of Geometry, Hard Cash
April Challenge 2020 Division 1
Strange Number, Squared Subsequences
February Lunchtime 2020 Division 2
At the Gates, Swapping to Palindrome, Not All Flavours, Secret Mission
January Lunchtime 2021 Division 2 (Unrated)
Binary Subsequence, Even Differences, Even Sum
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