February Challenge 2015
Let us play with rank list, Chef and Chain, Chef and Equality
April Challenge 2015
Chef and Interview, Broken Telephone, Chef and Piano Scales
June Challenge 2015
Chef and Memory Limit, Chef and Polygons
May Challenge 2016
Laddu, Chef and Big Soccer, Forest Gathering, Chef and Balls
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
June Challenge 2017
Pairwise union of sets, Triplets, Xenny and Coin Rankings, Chef and the Feast, Saboteur (Challenge), Chef and Prime Queries, A Good Set
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Sum and GCD
July Challenge 2019 Division 1
Hit the Coconuts, Guess the Prime!, Codechef War, Circular Merging
May Challenge 2020 Division 1
Binary Land, (Challenge) Nanobots, Chef and Bitwise Product, Sorting Vases, Triple Sort
May Challenge 2021 Division 1 (Unrated)
Valid Paths, Tree House, An Interesting Sequence, King Killing, Xor Equality, Tic Tac Toe, Modular Equation
India