November Challenge 2017
Chef goes Left Right Left, Chef Hates Palindromes, Villages and Tribes, Periodic Palindrome Construction
January Challenge 2018
K-Concatenation, Maximum Score, Rectangle, Partition the numbers
February Cook-Off 2018
Chef and Cook-Off, Chef and Line
March Challenge 2018 DIV 2
A Big Sale, Chef and Glove, Mix the Colors
March Lunchtime 2018 Division 2 (Unrated)
Chef and Friends, Three Integers, Magic Elements
September Challenge 2018 Division 2
Bad Shuffle, War of XORs, Magician versus Chef, Chef and Adventures
December Challenge 2018 Division 2
Chef and Interactive Contests
September Lunchtime 2018 Division 2
Judging Delay, Chef Restaurant
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Sum and GCD
July Challenge 2019 Division 2
Minimum and Maximum, Chef and Mean
October Challenge 2019 Division 2
Even Edges, Missing Number, Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
Exun Programming Prelims 2019 (Rated for all)
Weird Modulo Problem , Tennis Tournament
India