February Challenge 2015
Chef and Chain, Chef and Equality
April Challenge 2015
Chef and Interview, Broken Telephone
April Challenge 2016
Chef And Magical Path, Chef And Coloring
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
May Challenge 2017
Courses in an university, Median of adjacent maximum numbers, Chef and his daily routine
June Challenge 2020 Division 2
Chef and Icecream, Chef and String, Chef and Price Control
India