November 2010 Challenge
Graph Challenge, Chefs Bad Day, Randomly Testing Circuits
May Challenge 2015
Devu and binary String, Chef and Prime Divisors, Set Difference , Chef and new recipe
June Challenge 2015
Chef and Memory Limit, Anticommutative implication, Chef and Polygons, Chef and His Friend, Steady tables, Sereja and Matrix Division
July Challenge 2015
Bread, Na2a and lucky stone, Chef and Cube
August Challenge 2015
Gravity Guy, Cooking Machine
July Cook-Off 2015
Cops and the Thief Devu, Maximize Disjoint Pair Sum
United States