September Challenge 2017
Minimum Good Permutation, Chef and Pick Digit, Little Chef and Sums
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
September Lunchtime 2017
Chef and Cook-Off Contests
January Challenge 2018
Partition the numbers, String Merging, Rectangle, Maximum Score, K-Concatenation
January Lunchtime 2018
Chef and Game with Sequence
February Challenge 2018
Chef And His Characters, Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome
March Challenge 2018 DIV 2
Minion Chef and Bananas, Minions and Voting, Chef and Glove, Mix the Colors, Chef and Easy Problem, Pishty and Triangles, A Big Sale
April Challenge 2018 Division 1
Chef and Array (Challenge), Cutting Plants, Highway Crossing, Count Good Prefixes
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
February Lunchtime 2019 Division 2
Average Number, The Tricky Deal
March Challenge 2019 Division 2
Chef got Recipes, Chef and Number Game, Yet Again a Subarray Problem, Chef and a Beautiful Digit
March Lunchtime 2019 Division 2
Corrupted Seven-Segment Display, Testing Robot, Pogo Stick Competition
India