August Challenge 2018 Division 2
Sheokand and Number, Spell Bob
September Challenge 2018 Division 2
Magician versus Chef, Chef and Adventures
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit, Chef and Circles
January Challenge 2019 Division 2
Different Neighbours, Lucky Number Game, Distinct Pairs, Chef and Modulo Game, Fancy Quotes, A Pizza Slice
February Challenge 2019 Division 2
Deputy Chef, Guess It Right, Art of Balance, (Challenge) Chef with Orchestra in the Kitchen, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars, Manhattan Rectangle
April Challenge 2019 Division 1
Offer for Chef, Kira Loves Palindromes, Playing with Numbers, Subtree Removal
May Challenge 2019 Division 2
Matches, Reduce to One, Where to Build the Roads
August Challenge 2019 Division 1
Guddu and his Mother, Dilemma, Maximize an Expression
India