February Challenge 2015
Chef and Strange Formula, Chef and Chain, Chef and Equality, Chef and Strings, Let us play with rank list
April Challenge 2015
Count Sequences, Chef and Interview, Broken Telephone, Division of Lands, Chef and Piano Scales
June Challenge 2015
Chef and String, Chef and Polygons, Chef and Memory Limit, Chef and His Friend
July Challenge 2015
Addition and Multiplication, Maximum Difference Walk, Sereja and Game 2, Bread, MasterChef, Na2a and lucky stone, Chef and Cube, Rohith and Circles
August Challenge 2015
Chef and insomnia, Aditi and Magic Trick, Gravity Guy, Way Out, Cooking Machine
June Challenge 2016
Chef And The Hiring Event, Chef and Rectangle Array, Chef and New Game, Chef and Array and K, Chef And Binary Operation, Chef and Coins Game, Chef and cities, Devu and an Array
September Challenge 2016
Chef and Matrix Division, Chef and calculation, JosephLand, Faded Palindromes, Chef and digits of a number, Dividing Machine, Chef and Friends
October Challenge 2016
Sereja and Progressions, Chef and Keyboard, Big Queries, Fenwick Iterations, Chef and Three Dogs, Chef and Two String
October Cook-Off 2016
Sherlock and the Ugly Flower, Watson asks Does Permutation Exist, ChefWatson uses Social Network
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