June Challenge 2014
Chef and Subarray, Guessing Game
July Challenge 2014
Chef and Frogs, Chef and Rectangle Genome, Count Substrings, Reach The Point
August Challenge 2014
The Leaking Robot, Chef and Gift
October Challenge 2014
Chef and Ground, DevuLand, Dinosaurs and Laddus, Magical Girl and Colored Liquid Potions, Chef and Painting, Remy paints the fence
November Challenge 2014
Chef and Segment Game, Distinct Characters Subsequence, Chef and Red Black Tree, Let us construct palindrome, The Spelling Problem
February Challenge 2015
Jigsaw Puzzle Solving, Chef and Equality, Let us play with rank list, Chef and Strange Formula, Chef and Chain, Chef and Strings
July Challenge 2015
Chef and Cube, Na2a and lucky stone, MasterChef, Bread
December Challenge 2015
Chef and the stones, Oracle Devu and Longest Common Subsequence
August Cook-Off 2015
Chef and the Wildcard Matching
September Challenge 2016
Dividing Machine, Chef and calculation, Faded Palindromes, Chef and digits of a number, Chef and Friends
April Challenge 2017
Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
February Challenge 2019 Division 2
Chef and Secret Ingredients, Appy and Contest
April Challenge 2020 Division 2
Strange Number, Sell All the Cars, COVID Pandemic and Long Queue
India