November Challenge 2017
Villages and Tribes, Periodic Palindrome Construction
March Cook-off 2018 Division 2
Chef Judges a Competition
March Lunchtime 2018 Division 2 (Unrated)
Chef and Friends, Magic Elements
May Challenge 2018 Division 2
Xor Again, Minimum Deletions, Mighty Friend
September Challenge 2018 Division 2
Magician versus Chef, War of XORs, Chef and Adventures
December Challenge 2018 Division 2
Chef and Interactive Contests, Chef and An Ideal Problem
November Challenge 2018 Division 2
Chef and Ridges, Chef and Difficult Contests
October Challenge 2018 Division 2
Chef and Serves, Byte to Bit
February Challenge 2019 Division 2
Chef and Magical Jars, Chef and Secret Ingredients, Appy and Contest, Deputy Chef
February Cook-Off 2019 Division 2
Buying New Tablet, Chef and Party
February Lunchtime 2019 Division 2
The Tricky Deal, Average Number
April Challenge 2019 Division 2
Friend or Girlfriend, Maximum Remaining
November Challenge 2019 Division 2
Hard Sequence, Weapon Value
April Challenge 2020 Division 2
Strange Number, Unit GCD, Sell All the Cars, Leaked Answers (Challenge), COVID Pandemic and Long Queue
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