December Challenge 2018 Division 2
Chef and Interactive XOR, Max and Electrical Panel, Chef and An Ideal Problem, Chef and Interactive Contests
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests, Chef and Happiness
January Challenge 2019 Division 2
A Pizza Slice, (Challenge) Chef and Matching Game, Fancy Quotes, Chef and Modulo Game, Distinct Pairs, Lucky Number Game, Different Neighbours, Yet Another Problem About Sequences
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, (Challenge) Chef with Orchestra in the Kitchen, Art of Balance
April Challenge 2019 Division 1
Playing with Numbers, Subtree Removal, Moving Rectangles (Challenge)
May Challenge 2019 Division 1
Where to Build the Roads, Matches, Ada Rooks 2
May Lunchtime 2019 Division 1 (Unrated)
Grid Tour, Reverse Maximisation
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Sum and GCD, (Challenge) SnackDown 99
August Challenge 2019 Division 1
Football, Zombie and the Caves, Distribute Apples, Maximize an Expression, Dilemma, Encoding, Guddu and his Mother
August Lunchtime 2019 Division 1
Destroy Cells, Chef Does Coke Yet Again
February Challenge 2020 Division 1
Chef and Railway Stations, Expected Change, No Change Required, (Challenge) Raisins, Long Contest and Cook Off Overlaps
Biteration #2 (Rated for Division 2)
A - Books, C - Chef and Maths
India