September Challenge 2019 Division 2
Easy Fibonacci, Biladerim Icin, Fuzzy Linear Combinations, Chef Designed a Network, Chef and Interesting Subsequences , Chef and Good Subsequences
October Challenge 2019 Division 2
Even Edges, Missing Number, Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
November Challenge 2019 Division 2
Weapon Value, Chef and Minimum Colouring, Single Point of Failure, Smallest Beautiful Number, Hard Sequence, Physical Exercise, From Zero to Infinity
December Challenge 2019 Division 1
Chefina and Ranges, Binary XOR, Sticky Notes, Addition
September Challenge 2020 Division 1
Chef and Trump Cards, Ada Matrix, Divide Candies, Move the Coins - Creating Tests, Rotate the Polyline, Find XOR, Chefina and Swap
May Challenge 2021 Division 1 (Unrated)
Tree House, Xor Equality, Tic Tac Toe, Modular Equation
Taiwan