February Challenge 2015
Chef and Chain, Let us play with rank list, Chef and Equality
March Challenge 2015
Chef and Notebooks, Devu and his Class, Sign Wave
August Challenge 2015
Gravity Guy, Cooking Machine, Aditi and Magic Trick
October Challenge 2015
Count Subarrays, Who dares to be a millionaire
June Lunchtime 2016
Collisions, One more weird game
March Challenge 2017
Xenny and Alternating Tasks
November Challenge 2017
Periodic Palindrome Construction, Villages and Tribes
October Challenge 2018 Division 2
Byte to Bit, Chef and Serves
February Challenge 2019 Division 2
Chef and Secret Ingredients, Appy and Contest, Deputy Chef
India