April Challenge 2016
Chef And Coloring, Chef and Ballons
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Cook-Off 2016
Watson asks Does Permutation Exist, ChefWatson uses Social Network
August Long Challenge 2017
Chef and Mover, Greedy Candidates, Palindromic Game, Chef And Fibonacci Array, Chef and Rainbow Array
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef and Subarray Queries, Villages and Tribes, Periodic Palindrome Construction, Chef goes Left Right Left, Chef Hates Palindromes
December Challenge 2017
Total Diamonds, Chef And his Cake, Chef And Easy Xor Queries, Penalty Shoot-out, Chef and Hamming Distance of arrays
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
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