September Challenge 2015
Count Steps in Matrix, Chain of Doughnuts
December Challenge 2017
Penalty Shoot-out, Chef and Hamming Distance of arrays, Red and blue points, Chef And Easy Xor Queries, Chef, Leonardo And Queries, Chef And his Cake, Total Diamonds, Chef and Universe, Chef and Direction
September Mega Cook-Off 2019 Division 1
Angry Grandfather, Hiring Chefs, Fitness Exercises
October Challenge 2019 Division 1
Array Modification, Faulty System, Fun with Lists, Bacterial Reproduction, Even Edges, Chef and Maximum Star Value
January Challenge 2020 Division 1
Chefland Army, (Challenge) Building Anthills, Army of Me, English, Chefina and Prefix Suffix Sums, Doofish Matrix, Doraemon, Chef and Dynamo
March Challenge 2020 Division 1
Chef and DAG, Break, Winning Ways 2, Lasers Everywhere, Inverse of a Function, Lasers Everywhere Alternative, Good Subsequences, Egg-free DAG
Spain