November Challenge 2014
Distinct Characters Subsequence, Let us construct palindrome, Chef and Segment Game
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
January Long Challenge 2016
Churu and Balls, Chef and Time Machine, Devu and Perfume
April Challenge 2016
Help Watson Escape, Chef And Coloring, Chef And Magical Path, Chef and Ballons
March Challenge 2017
Cooking Schedule, Xenny and Alternating Tasks, Pishty and birthday, Bear and Extra Number, (CH) Bear and Sorted Rows, Bandwidth of a matrix
April Challenge 2017
Chef and Divisor Tree, Similar Dishes, Bear and Clique Distances, Dish Of Life, Stable market, Bear and Row 01
August Long Challenge 2017
Chef and Rainbow Array, Chef And Fibonacci Array, Chef and Mover, Hill Jumping, Palindromic Game, Greedy Candidates, Strings and Graphs
October Challenge 2017
Max Mex, A Balanced Contest, Counter Test For CHEFSUM
August Cook-Off 2017
Real obtuse, From heaven to earth
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging
India