August Challenge 2015
Cooking Machine, Aditi and Magic Trick
September Challenge 2015
Chain of Doughnuts, Count Steps in Matrix
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
August Cook-Off 2015
Chef and the Wildcard Matching
September Challenge 2016
Chef and digits of a number, Chef and calculation, Faded Palindromes, Chef and Friends
August Cook-Off 2016
Tweedle-Dee and Tweedle-Dum
June Challenge 2017
A Good Set, Xenny and Coin Rankings
September Challenge 2017
Little Chef and Sums, Minimum Good Permutation, Sereja and Commands, Chef and Pick Digit
October Challenge 2017
Chef and a great voluntary Program, Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef and Intersection Line, Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
January Challenge 2018
K-Concatenation, Partition the numbers, String Merging, Rectangle, Maximum Score, (Challenge) Chef and Palindromes
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, (Challenge) Biased Committee, Permutation and Palindrome
April Challenge 2018 Division 1
Chef and Array (Challenge), Highway Crossing, Count Good Prefixes
India