June Challenge 2016
Chef And Binary Operation, Devu and an Array, Chef and Array and K
August Challenge 2019 Division 2
Guddu and his Mother, Encoding, Dilemma, Football, Distribute Apples, Zombie and the Caves
August Lunchtime 2019 Division 2
Destroy Cells, Chef Does Coke Yet Again, Chef and Trip, Eidi Gift
September Challenge 2019 Division 1
Biladerim Icin, Fuzzy Linear Combinations, Doofish Set, Power Sum, Chef Designed a Network
November Challenge 2019 Division 1
Physical Exercise, Single Point of Failure, From Zero to Infinity, Smallest Beautiful Number
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Sticky Notes, Test Generation, Addition
January Challenge 2020 Division 1
Chef and Dynamo, Doraemon, Doofish Matrix, Chefina and Prefix Suffix Sums, English
February Challenge 2020 Division 1
Chef and Railway Stations, Expected Change, No Change Required, Long Contest and Cook Off Overlaps
Israel