September Challenge 2016
Faded Palindromes, Chef and digits of a number
March Challenge 2017
Xenny and Alternating Tasks
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Pairwise union of sets
July Challenge 2017
Whats in the Name, Chef and Sign Sequences
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates, Strings and Graphs
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
February Challenge 2018
Broken Clock, Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
Quick Code (Rated for Division 2)
Immortal Frieza, Majin Vegeta, Dr Geros lab
January Challenge 2019 Division 2
Different Neighbours, A Pizza Slice, Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Lucky Number Game
September Challenge 2019 Division 2
Chef and Good Subsequences, Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
September Mega Cook-Off 2019 Division 2
Angry Grandfather, Fitness Exercises , Two Groups, Playing with Matches
India