December Cook-Off 2012
Packaging Cupcakes, Root of the Problem, Reversing directions
February 2013 Challenge
Little Elephant and Cards, Efficient Painting, Word Play, Observing the Tree, Vacation, Climbing Stairs, Triangular Queries, Magic Board, Room Corner, Buy1-Get1
February Cook-Off 2013
Lack of Logic, Row and Column Operations
March Challenge 2013
Minesweeper, Peaceful Calculator, Fire Escape Routes, Approximately, Festivals, Tourist Translations, Random decreasing function, Little Elephant and Colored Coins
August Challenge 2013
Little Elephant and Lemonade, Hello Hello, Save The Princess, The Number Of Solutions, Chef and Segments, Splitting Candies
September Challenge 2013
Cool Guys, Chef and Integers
March Cook-Off 2014
Game of Divisors, ABC-Strings, Dividing Stamps
February Challenge 2014
Little Elephant and Movies, Draughts, Make It Zero, Make Him Happy, Chef and Favourite Sequence, Longest Common Pattern, Little Elephant and Subarrays, Colored Array
April LunchTime 2014
Minimum Product, Tracy and Charlie, Knight Fork
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Chef and Equality
June Challenge 2017
A Good Set, Xenny and Coin Rankings, Pairwise union of sets
May Challenge 2019 Division 2
Matches, Reduce to One, Where to Build the Roads
Switzerland