December Challenge 2018 Division 2
Chef and Interactive Contests
November Challenge 2018 Division 2
Chef and Difficult Contests
January Challenge 2019 Division 2
Lucky Number Game, Fancy Quotes
February Challenge 2019 Division 2
Deputy Chef, Appy and Contest, Chef and Secret Ingredients, Chef and Magical Jars
March Challenge 2019 Division 2
Chef and Number Game, Chef and a Beautiful Digit
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining, Fencing
August Challenge 2019 Division 2
Zombie and the Caves, Distribute Apples, Dilemma, Football
September Challenge 2019 Division 2
Easy Fibonacci, Chef Designed a Network, Chef and Interesting Subsequences
October Challenge 2019 Division 2
Chef and Maximum Star Value, Array Modification, Operations on a Matrix, Phone Prices
February Challenge 2020 Division 2
The Theatre Problem, Long Contest and Cook Off Overlaps, (Challenge) Raisins, Hard Cash, School of Geometry, No Change Required
January Lunchtime 2021 Division 3 (Unrated)
Ashishgup and Interviews, Pair Me, Even Differences, Even Sum
February Challenge 2021 Division 3
Frog Sort, Team Name, Maximise Function, Highest Divisor
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