January Challenge 2015
Sereja and Votes, Chef and Stones
February Challenge 2015
Chef and Chain, Chef and Equality
April Challenge 2015
Chef and Interview, Broken Telephone
April Challenge 2016
Chef and Ballons, Chef And Coloring
June Challenge 2016
Devu and an Array, Chef And Binary Operation, Chef and Coins Game
July Challenge 2016
Andrash and Stipendium, Chefland and Electricity
September Challenge 2016
Chef and digits of a number
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
June Challenge 2017
A Good Set, Xenny and Coin Rankings
April Challenge 2018 Division 2
Average of Pairs, Workers
July Challenge 2018 Division 2
Magic Set, Strike or Spare
India