August Challenge 2019 Division 2
Distribute Apples, Football
September Challenge 2019 Division 2
Easy Fibonacci, Chef and Interesting Subsequences
November Challenge 2019 Division 2
Physical Exercise, Hard Sequence, Weapon Value, Chef and Minimum Colouring
December Challenge 2019 Division 2
Plus Multiply, Binary XOR, Easy Subsequence Selection, That Is My Score!, Addition
January Challenge 2020 Division 2
Doraemon, Breaking Bricks, Chefina and Prefix Suffix Sums, Equality, Chef and Dynamo
February Challenge 2020 Division 1
No Change Required, The Theatre Problem, School of Geometry, Hard Cash, (Challenge) Raisins, Long Contest and Cook Off Overlaps
March Challenge 2020 Division 1
XOR Engine, Ada Bishop 2, Pintu and Fruits
April Challenge 2020 Division 1
Strange Number, Leaked Answers (Challenge), Squared Subsequences, Ready Bitwise
September Challenge 2020 Division 1
Chefina and Swap, Chef and Trump Cards, Find XOR, Ada Matrix
February Challenge 2021 Division 2
Frog Sort, Team Name, Prime Game, Maximise Function
February Lunchtime 2021 Division 2
Sed Max, Coprime Range, Palpal Strings, Average Sorting
March Challenge 2021 Division 2
Interesting XOR!, Dense Graph, College Life 4, Consecutive Adding, Paparazzi Gennady, Space Arrays, Wireless Electricity (Challenge), Maximum Topological Sort
July Challenge 2021 Division 1 (Unrated)
XxOoRr, Optimal Denomination
India