December Challenge 2015
Chef and the stones, Plane Division
January Long Challenge 2016
Rupsa and the Game, Churu and Balls
February Challenge 2016
Chef-Detective, Rectangles of Love, Devu and a light discussion, Chef and Strange Operations
March Challenge 2016
Palindromic substrings, maximize the sum
April Challenge 2016
Help Watson Escape, Chef and Ballons, Chef And Magical Path, Chef And Coloring
September Challenge 2016
Chef and digits of a number
Bangladesh