August Challenge 2018 Division 2
Modular GCD, Problem Sort, Sheokand and Number, Spell Bob, Coordinate Compression
February Challenge 2019 Division 2
Appy and Contest, Maximize the Tax, Deputy Chef, Art of Balance, (Challenge) Chef with Orchestra in the Kitchen, Yet Another Tree Problem, Xor Decomposition, Chef and Secret Ingredients, Chef and Magical Jars, Guess It Right, Manhattan Rectangle
April Challenge 2019 Division 1
Playing with Numbers, Subtree Removal
