August Long Challenge 2017
Chef and Mover, Chef and Rainbow Array, Greedy Candidates
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Villages and Tribes, Periodic Palindrome Construction
December Challenge 2017
Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
March Challenge 2018 DIV 2
A Big Sale, Chef and Glove
September Challenge 2018 Division 2
Magician versus Chef, Chef and Adventures
November Challenge 2018 Division 2
Chef and Happiness, Chef and Difficult Contests, Chef and Ridges
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
February Challenge 2021 Division 3
Maximise Function, Highest Divisor
India