July Challenge 2016
Chefland and Electricity, Andrash and Stipendium
September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
October Challenge 2016
Sereja and Progressions, Chef and Keyboard, Fenwick Iterations, Chef and Three Dogs
November Challenge 2016
Task for Alexey, Chef and squares, Count Permutations
August Cook-Off 2016
Tweedle-Dee and Tweedle-Dum
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Bandwidth of a matrix, Bear and Extra Number, Xenny and Alternating Tasks, (CH) Bear and Sorted Rows
January Cook-Off 2017
Digit Longest Increasing Subsequences 2
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
September Challenge 2017
Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Villages and Tribes
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
India