February Challenge 2015
Let us play with rank list, Chef and Equality, Chef and Chain
August Challenge 2015
Gravity Guy, Cooking Machine
April Challenge 2016
Chef and Ballons, Chef And Coloring
August Challenge 2016
Chef and Round Run, Chef and Chocolate
March Cook-Off 2016
Digital clock, Alternating subarray prefix
June Challenge 2017
A Good Set, Xenny and Coin Rankings
July Challenge 2017
Chef and Sign Sequences, IPC Trainers, Calculator , Tree Expectancy, Whats in the Name
November Challenge 2017
Chef goes Left Right Left, Periodic Palindrome Construction, Villages and Tribes
May Challenge 2020 Division 2
Isolation Centers, Coronavirus Spread
June Challenge 2020 Division 2
Even Matrix, The Tom and Jerry Game!, Chef and Icecream, Chef and String, Chef and Price Control
July Cook-Off 2020 Division 2
Even-tual Reduction, OR-thodox Distinction
India