September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Bandwidth of a matrix, (CH) Bear and Sorted Rows, Bear and Extra Number, Xenny and Alternating Tasks
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
June Challenge 2017
A Good Set, Chef and the Feast, Xenny and Coin Rankings, Pairwise union of sets
August Long Challenge 2017
Chef and Rainbow Array, Greedy Candidates
September Challenge 2017
Little Chef and Sums, Chef and Pick Digit, Minimum Good Permutation
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean
August Challenge 2019 Division 2
Distribute Apples, Zombie and the Caves, Football, Dilemma
December Challenge 2019 Division 2
Plus Multiply, Easy Subsequence Selection, That Is My Score!
February Challenge 2020 Division 2
School of Geometry, Hard Cash
August Long 2022 Division 3 (Rated)
Angled Flip, Sale Season, XOR with smallest element, Hello Equation, Two Trains, Make A and B equal
