June Challenge 2017
Xenny and Coin Rankings, A Good Set
October Challenge 2017
Max Mex, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
February Challenge 2018
Permutation and Palindrome, Car-pal Tunnel, Chef And The Patents, Chef And His Characters
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove
March Lunchtime 2018 Division 2 (Unrated)
Chef and Friends, Three Integers, Magic Elements
May Lunchtime 2018 Division 2
Trace of Matrix, Count Substrings
India