February Challenge 2020 Division 2
Hard Cash, School of Geometry
June Challenge 2020 Division 2
The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control, Even Matrix
July Challenge 2020 Division 2
Ada King, Chefina and Swaps, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings
August Challenge 2020 Division 2
Another Card Game Problem, Chef and Wedding Arrangements, Smallest KMP, Chef and Linear Chess, Chef Wars - Return of the Jedi
September Challenge 2020 Division 2
Chefina and Swap, A Problem on Sticks, Chef and Trump Cards, Find XOR, Ada Matrix, Coronavirus Spread 2
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
August Lunchtime 2020 Division 2
Mode of Frequencies, Game on a Strip
June Lunchtime 2020 Division 2
Chef and Demonetisation, Increasing Decreasing
December Challenge 2020 Division 2
Hail XOR, Positive Prefixes, Even Pair Sum, Vaccine Production, Vaccine Distribution
Code Ensemble (Rated for Division 2)
Priya and AND, Help Martha
UWCOI 2021 (Rated for all)
Organisation, Hidden Numbers, Array Swaps
May Cook-Off 2021 Division 2
The Last Problem, Chef and Subarrays
June Cook-Off 2021 Division 2
Binary String on Steroids, The Wave
June Lunchtime 2021 Division 2
From Rational to Binary, False Number, Unpleasant Ones, Tic Tac Toe
April Long Two 2022 Division 1 (Unrated)
Geometric Mean Inequality
India