February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Dish Of Life, Bear and Row 01, 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, Pairwise union of sets, Triplets, Xenny and Coin Rankings, Chef and the Feast
July Challenge 2017
Chef and Sign Sequences, Whats in the Name, Calculator , IPC Trainers
August Long Challenge 2017
Chef and Rainbow Array, Greedy Candidates, Chef and Mover, Palindromic Game
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
May Challenge 2018 Division 1
Dibs on Fibs, Fake Binary Search
December Challenge 2018 Division 1
Max and Electrical Panel, Chef and Interactive XOR
January Challenge 2019 Division 1
Yet Another Problem About Sequences, Different Neighbours, Distinct Pairs, (Challenge) Chef and Matching Game, A Pizza Slice
India