July Challenge 2017
Whats in the Name, Calculator , Chef and Sign Sequences
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, 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
Periodic Palindrome Construction, Villages and Tribes, Chef Hates Palindromes, Chef goes Left Right Left
August Cook-Off 2017
Real obtuse, From heaven to earth
March Challenge 2018 DIV 2
A Big Sale, Minion Chef and Bananas, Minions and Voting, Chef and Glove, Mix the Colors, Chef and Easy Problem
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Judges a Competition
India