June Challenge 2015
Chef and Memory Limit, Chef and Polygons
June Challenge 2016
Chef and Coins Game, Devu and an Array
September Challenge 2016
Faded Palindromes, Chef and calculation, Chef and digits of a number
August Long Challenge 2017
Chef and Rainbow Array, Chef and Mover
September Challenge 2017
Little Chef and Sums, Minimum Good Permutation, Chef and Pick Digit
October Challenge 2017
Max Mex, A Balanced Contest
November Challenge 2017
Chef Hates Palindromes, Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Chef And his Cake, Penalty Shoot-out
September Lunchtime 2017
Chef and Cook-Off Contests
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
February Challenge 2018
Chef And His Characters, Chef And The Patents
India