May Cook-Off 2019 Division 2
Chain Reaction, Misha and Nice Sets, Recover the Sequence
May Lunchtime 2019 Division 2 (Unrated)
Dummy Palindromic Strings, Grid Tour, CV
June Challenge 2019 Division 2
Chef and Ingredients, Sum and GCD, Guddu on a Date, Lent Money, Chef and Proxy, Road Signs
June Cook-Off 2019 Division 1
Ants and Anteaters, Drink Slush
July Challenge 2019 Division 1
Guess the Prime!, Codechef War
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
November Lunchtime 2019 Division 1
Planting Trees, Washing Windows
Poland