December Challenge 2018 Division 1
Directing Edges, Max and Electrical Panel, Chef and Interactive XOR
November Challenge 2018 Division 2
Chef and Ridges, Appy Loves One, Good Median, Magician versus Chef 2, Chef and Difficult Contests, Chef and Happiness
October Challenge 2018 Division 2
Chef and Surprise Chessboard, Chef and Circles, Byte to Bit, Chef and Serves, Minimize Digitsum, Beautiful Bricks, Appy and Balloons
August Lunchtime 2018 Division 2
Chef and Problem Setting, Chef and Eid, Mix Mix Game
January Challenge 2019 Division 1
A Pizza Slice, Party, Distinct Pairs, Different Neighbours, Yet Another Problem About Sequences, Partition the Graph
February Challenge 2019 Division 1
Manhattan Rectangle, Guess It Right, Chef and Secret Ingredients, Xor Decomposition, Art of Balance
April Challenge 2019 Division 1
Playing with Numbers, Subtree Removal, Mininum XOR over Tree, Kira Loves Palindromes, Offer for Chef
June Challenge 2019 Division 1
Lent Money, Chef and Ingredients, Chef and His Dish, Intersecting Paths, Sum and GCD, Forgotten Tree 9
July Challenge 2019 Division 1
Guess the Prime!, Circular Merging
