August Challenge 2016
Chef and Round Run, Chef and Chocolate
May Challenge 2017
Chef and his daily routine, Courses in an university, Blocked websites, Median of adjacent maximum numbers, Chef and Subsequences
June Challenge 2017
Xenny and Coin Rankings, A Good Set
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Greedy Candidates
October Challenge 2017
Max Mex, A Balanced Contest
August Cook-Off 2017
Real obtuse, From heaven to earth
June Lunchtime 2017
Maximum Unique Segment, Two Numbers
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
