September Challenge 2016
Faded Palindromes, Chef and digits of a number
February Challenge 2017
Chef and Triangles, Chef and His Apartment Dues, Gerrymander
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers
August Long Challenge 2017
Palindromic Game, Greedy Candidates, Chef and Mover, Chef and Rainbow Array
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
February Lunchtime 2018
Game with numbers, Jumping in the hills
June Cook-Off 2018 Division 1
Archi and Comparsion, Good Permutations
India