October Challenge 2015
Who dares to be a millionaire
March Challenge 2016
Palindromic substrings, maximize the sum
July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
May Challenge 2017
Courses in an university, Chef and his daily routine
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
February Challenge 2018
Car-pal Tunnel, Permutation and Palindrome, Chef And The Patents, Chef And His Characters
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Restores a Matrix, Chef Judges a Competition
India