December Challenge 2013
Magic Pairs, Funny Marbles
September Challenge 2014
Chef and Left-Right, Fun with Rotation
October Challenge 2014
Remy paints the fence, Chef and Ground, Chef and Square, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
November Challenge 2014
Chef and Red Black Tree, Let us construct palindrome, Distinct Characters Subsequence, Chef and Segment Game
January Challenge 2015
Chef and Stones, Gcd Queries
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Chef and Equality
December Challenge 2015
Chef and Girls, Chef and Filters, Plane Division, Chef and the stones, Oracle Devu and Longest Common Subsequence
January Long Challenge 2016
Sereja and Salesman, Chef and Inflation, Rupsa and the Game, Churu and Balls, Chef and Making Triples, Chef and Time Machine, Devu and Perfume
February Challenge 2016
Chef and Strange Operations, Devu and a light discussion, Chef-Detective
April Challenge 2016
Help Watson Escape, Chef And Coloring, Chef And Magical Path, Chef and Ballons
May Challenge 2016
Chef and math, Chef and Balls, Forest Gathering, Chef and Big Soccer, Laddu
June Challenge 2016
Chef And The Hiring Event, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Devu and an Array
Bangladesh