January 2011 Challenge
Flu Shot Lineup, Count Relations, Chess Pushing Game
June Long Contest 2011
Maximal Score Path, Chef Teams, Restock
July Cook-off 2011
Misinterpretation, Garden Squares, Pleasing Chief
October Long Contest 2011
Dish Distribution, Lucky Palin
October Challenge 2013
Little Elephant and Bamboo, Helping Lira, Maxim and Dividers, Sereja and Transformation, Yet Another Nice Girl
November Challenge 2013
Missing some chairs, Yet Another Cute Girl, Square Digit Squares, Uncle Johny, Superpowers of 2
March Challenge 2014
Team Split, Little Chef and Numbers
December Challenge 2014
XOR with Subset, Chef and Apple Trees, Sereja and GCD
February Challenge 2015
Chef and Chain, Chef and Strange Formula, Chef and Strings, Let us play with rank list, Xor Matrix, Chef and Equality
August Challenge 2016
Funny gnomes, Maximum Grid
