September Challenge 2018 Division 2
War of XORs, Magician versus Chef, Chef and Adventures
December Challenge 2018 Division 1
Max and Electrical Panel, Chef and Interactive XOR
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Good Median, Chef and Difficult Contests, Chef and Happiness
October Challenge 2018 Division 2
Appy and Balloons , Minimize Digitsum, Chef and Surprise Chessboard, Chef and Serves, Byte to Bit, Chef and Circles
February Challenge 2019 Division 1
Art of Balance, Chef and Secret Ingredients, Manhattan Rectangle, Guess It Right
April Challenge 2019 Division 2
Playing with Numbers, Friend or Girlfriend, Maximum Remaining, Subtree Removal, Fencing
November Challenge 2019 Division 2
Weapon Value, Hard Sequence
February Challenge 2020 Division 2
School of Geometry, Hard Cash
April Challenge 2020 Division 2
Strange Number, Sell All the Cars, COVID Pandemic and Long Queue
October Challenge 2020 Division 2
Positive AND, Replace for X, Covid Run, Chef and Easy Queries
Russia