July Challenge 2020 Division 2
Chefina and Swaps, Chef and Dragon Dens, Missing a Point, Doctor Chef, Chef and Card Game, Chef and Strings, Ada King
August Challenge 2020 Division 1
Insanely Hard School Exams, Subsequence Frequency Counting, Smallest KMP, Chef and Wedding Arrangements
September Challenge 2020 Division 1
Chefina and Swap, Ada Matrix, Divide Candies, Find XOR, Chef and Trump Cards
July Cook-Off 2020 Division 1
Even-tual Reduction, OR-thodox Distinction
June Lunchtime 2020 Division 2
Maximum AND, Chef and Demonetisation, Increasing Decreasing
India