April Challenge 2016
Chef and Ballons, Chef And Magical Path, Chef And Coloring
July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs
November Challenge 2016
Count Permutations, Chef and squares, Task for Alexey
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
June Challenge 2017
A Good Set, Xenny and Coin Rankings
India