March Challenge 2017
Xenny and Alternating Tasks
May Challenge 2017
Chef and his daily routine, Courses in an university
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
August Challenge 2018 Division 2
Modular GCD, Spell Bob, Problem Sort
September Challenge 2018 Division 2
Magician versus Chef, Chef and Adventures
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
March Challenge 2019 Division 2
Chef and Number Game, Chef and a Beautiful Digit
India