April Challenge 2016
Chef And Coloring, Chef and Ballons
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
June Challenge 2017
A Good Set, Chef and the Feast
July Challenge 2018 Division 2
Magic Set, Strike or Spare
May Challenge 2019 Division 2
Where to Build the Roads, Reduce to One, Matches
June Challenge 2019 Division 2
Road Signs, Chef and Proxy, Lent Money, Guddu on a Date, Chef and Ingredients, Sum and GCD
July Challenge 2019 Division 1
Guess the Prime!, Circular Merging
August Challenge 2019 Division 1
Guddu and his Mother, Dilemma, Maximize an Expression
United States