November Challenge 2016
Friends Meeting, Gift and Chef, Chef and squares, Task for Alexey, Count Permutations
December Challenge 2016
Train Partner, Kirito in labyrinth, Our Base is Under Attack
January Challenge 2017
Capital Movement, Cats and Dogs, Reservior, Tourists in Mancunia
February Challenge 2017
Chef and His Apartment Dues, Chef and Triangles
March Challenge 2017
Xenny and Alternating Tasks, Bear and Extra Number, Bandwidth of a matrix
April Challenge 2017
Dish Of Life, Bear and Row 01, Similar Dishes
June Challenge 2017
Chef and Prime Queries, A Good Set, Chef and the Feast, Xenny and Coin Rankings, Triplets, Pairwise union of sets
June Challenge 2018 Division 2
Binary Shuffle, Naive Chef
India