May Challenge 2017
Chef and his daily routine, Courses in an university, Median of adjacent maximum numbers
September Challenge 2017
Chef and Pick Digit, Minimum Good Permutation, Little Chef and Sums
October Challenge 2017
Max Mex, Counter Test For CHEFSUM, A Balanced Contest
November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes
September Lunchtime 2017
Chef and Cook-Off Contests
March Challenge 2018 DIV 2
A Big Sale, Minion Chef and Bananas, Mix the Colors, Chef and Glove
March Cook-off 2018 Division 2
Chef Goes to the Cinema, Chef Judges a Competition
September Mega Cook-Off 2018 Division 2
ATM Machine, Make a Permutation
August Challenge 2018 Division 2
Sheokand and Number, Spell Bob, Problem Sort, Modular GCD
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures, Bad Shuffle
September Lunchtime 2018 Division 2
Judging Delay, Chef Restaurant
ProCon 2018 (Rated for all)
The Great Run, Kill them with your success
India