October Challenge 2014
Remy paints the fence, Chef and Ground, Magical Girl and Colored Liquid Potions, DevuLand, Dinosaurs and Laddus
November Challenge 2014
The Spelling Problem, Chef and Red Black Tree, Distinct Characters Subsequence, Chef and Segment Game
January Challenge 2015
Chef and A Large Permutation, Chef and Stones, Sereja and Votes, One Dimensional Kingdoms, Gcd Queries
February Challenge 2015
Chef and Chain, Chef and Equality, Let us play with rank list
June Challenge 2016
Chef And Binary Operation, Devu and an Array, Chef and Coins Game, Chef and Array and K, Chef And The Hiring Event
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
May Challenge 2018 Division 2
Mighty Friend, Minimum Deletions, Xor Again
India