April Challenge 2012
Fit to Play, Stacking Pancakes, Double Strings
June Challenge 2012
Little Elephant and Candies, Arranging Cup-cakes
July Challenge 2012
Chef's Dream, My Fair Coins, The Gray-Similar Code, Little Elephant and Bubble Sort, Gift Rift, Restaurant Rating, Addition chains
August Challenge 2012
Delivery Boy, Lucky Driving, Little Elephant and Bombs
September Challenge 2012
Kisses & Hugs, Racing Horses, Three is Crowd
October Challenge 2012
Little Elephant and Order, Fierce Battles, Event Organizer, Maximum Sub-rectangle in Matrix, Blade Master, The New Scheme, Need More Diamonds
September Cook-Off 2012
Recipe Reconstruction, Carvans
November Cook-Off 2012
Little Elephant and Permutations, Little Elephant and Divisors
December Challenge 2012
Granama Recipes, Book Exercises, Magic Rankings, The Uncountable Ways, Pizza Delivery
February Cook-Off 2013
Lack of Logic, Row and Column Operations
November Challenge 2013
Yet Another Cute Girl, Missing some chairs, Square Digit Squares, Uncle Johny, Sereja and Vectors, Superpowers of 2, Chef Game
February Challenge 2014
Longest Common Pattern, Little Elephant and Subarrays
November Challenge 2014
Chef and Segment Game, Distinct Characters Subsequence, Let us construct palindrome
July Challenge 2015
Na2a and lucky stone, Chef and Cube
