August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Penalty Shoot-out, Chef And his Cake, Total Diamonds
August Cook-Off 2017
Real obtuse, From heaven to earth
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
India