March Challenge 2017
Bear and Extra Number, Xenny and Alternating Tasks
April Challenge 2017
Dish Of Life, Similar Dishes
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
June Challenge 2017
A Good Set, Xenny and Coin Rankings
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover, Palindromic Game, Greedy Candidates
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, A Balanced Contest, Counter Test For CHEFSUM
November Challenge 2017
Chef and Intersection Line, Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
October Cook-Off 2017
Chef and Employment Test, Chef and Weird Queries
May Challenge 2018 Division 1
Fake Binary Search, Dibs on Fibs
Encoder (Rated for Division 2)
Knight Chess, Second Largest Element, Old Farmer, Paint the Wall
India