May Challenge 2017
Chef and his daily routine, Median of adjacent maximum numbers, Courses in an university
June Challenge 2017
A Good Set, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, Whats in the Name
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
October Challenge 2017
Max Mex, A Balanced Contest
December Challenge 2017
Chef and Hamming Distance of arrays, Penalty Shoot-out, Chef And his Cake, Total Diamonds
July Cook-Off 2017
Chang and Bitwise OR, Chang and the Perfect Function
August Cook-Off 2017
Real obtuse, From heaven to earth
October Cook-Off 2017
Chef and Employment Test, Chef and Weird Queries
November Cook-Off 2017
Online Chess, Random Pair
December Cook-Off 2017
Beautiful Array, Football Match
September Lunchtime 2017
Chef and Cook-Off Contests
February Challenge 2018
Chef And His Characters, Chef And The Patents
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Judges a Competition
March Lunchtime 2018 Division 2 (Unrated)
Chef and Friends, Magic Elements
November Challenge 2019 Division 2
Hard Sequence, Weapon Value
