July Challenge 2017
Chef and Sign Sequences, Calculator , Whats in the Name
October Challenge 2017
Max Mex, A Balanced Contest
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
December Challenge 2017
Chef And his Cake, Penalty Shoot-out
October Cook-Off 2017
Chef and Weird Queries, Chef and Employment Test
December Lunchtime 2017
Days in Month, Strange Function
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, String Merging, Partition the numbers
January Lunchtime 2018
Chef and Game with Sequence
February Challenge 2018
Chef And The Patents, Car-pal Tunnel, Permutation and Palindrome, Chef And His Characters
February Cook-Off 2018
Chef and Cook-Off, Chef and Line
March Challenge 2018 DIV 2
Minion Chef and Bananas, Minions and Voting, Chef and Glove, Mix the Colors, A Big Sale, Chef and Easy Problem
October Mega Cook-Off 2018 Division 2
Binary Nim 2, Ada and the Staircase
September Challenge 2018 Division 2
Magician versus Chef, Chef and Adventures
October Challenge 2018 Division 2
Appy and Balloons , Minimize Digitsum, Chef and Serves, Byte to Bit, Chef and Circles
July Lunchtime 2018 Division 2
Split Stones, Forced Particles
India