April Challenge 2016
Chef and Ballons, Chef And Magical Path, Chef And Coloring, Help Watson Escape
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Chef and Keyboard, Chef and Three Dogs, Fenwick Iterations
October Cook-Off 2016
Watson asks Does Permutation Exist
February Challenge 2017
Chef and His Apartment Dues, Most Frequent Element
March Challenge 2017
Bandwidth of a matrix, Bear and Extra Number, Xenny and Alternating Tasks
April Challenge 2017
Chef and Divisor Tree, Dish Of Life, Bear and Row 01, Bear and Clique Distances, Similar Dishes
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Chef and a Beautiful Digit
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean , Parity Again
August Challenge 2019 Division 2
Dilemma, Football, Distribute Apples
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
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