June Challenge 2017
Chef and the Feast, Xenny and Coin Rankings, Triplets, A Good Set
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator
September Challenge 2017
Minimum Good Permutation, Little Chef and Sums, Chef and Pick Digit
October Challenge 2017
Max Mex, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
January Lunchtime 2018
Chef and Game with Sequence
Romania