January Challenge 2014
Sereja and Graph, Meteor, Bon Appetit, Please like me, Chef and Feedback, Magic Trick
July Challenge 2014
Chef and Frogs, Dish Owner, Reach The Point, Count Substrings, Garden Game, Little Elephant and Painting
January Long Challenge 2016
Sereja and Salesman, Devu and Perfume, Chef and Time Machine, Dai Ma Chu Shi, Cyclist Race, Asteroids, Chef and Making Triples, Churu and Balls, Rupsa and the Game, Chef and Inflation
December Challenge 2018 Division 1
(Challenge) Delete DAG, Max and Electrical Panel, Directing Edges, Chef and Interactive XOR
Russia