August Long Challenge 2017
Chef and Mover, Chef and Rainbow Array, Greedy Candidates, Palindromic Game
September Challenge 2017
Sereja and Commands, Chef and Pick Digit, Minimum Good Permutation, Fill The Matrix, Little Chef and Sums
October Challenge 2017
Counter Test For CHEFSUM, A Balanced Contest, Max Mex, Chef and a great voluntary Program
December Challenge 2017
Total Diamonds, Chef And his Cake, Penalty Shoot-out, Chef and Hamming Distance of arrays
January Challenge 2018
Partition the numbers, String Merging, Rectangle, K-Concatenation, Maximum Score
September Mega Cook-Off 2018 Division 2
ATM Machine, Make a Permutation
November Challenge 2018 Division 1
Chef, Primes and Trees (Challenge), Magician versus Chef 2, Good Median, Appy Loves One
October Challenge 2018 Division 1
Appy and Balloons , Beautiful Bricks, Minimize Digitsum, Chef and Surprise Chessboard
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Art of Balance
India