September Challenge 2016
Chef and digits of a number, Faded Palindromes, Chef and calculation
February Challenge 2017
Chef and His Apartment Dues
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Similar Dishes, Dish Of Life, Bear and Row 01
May Challenge 2017
Chef and his daily routine, Courses in an university
July Challenge 2017
Chef and Sign Sequences, Whats in the Name
August Long Challenge 2017
Chef and Rainbow Array, Greedy Candidates
September Challenge 2017
Minimum Good Permutation, Little Chef and Sums, Chef and Pick Digit
October Challenge 2017
Max Mex, A Balanced Contest
September Lunchtime 2017
Chef and Cook-Off Contests
March Challenge 2018 DIV 2
A Big Sale, Mix the Colors, Chef and Glove
India