August Long Challenge 2017
Greedy Candidates, Chef and Rainbow Array
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
September Lunchtime 2017
Chef and Cook-Off Contests
February Challenge 2018
Chef And His Characters, Chef And The Patents, Permutation and Palindrome
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Guddu on a Date
India