June 2009 (Contest IV)
Product of divisors, Count the squares, The Lucky Draw, The battlefield
July 2009 (Contest V)
Lights Off, Quadratic Equations, The White Knight, Lights Off, Revisited!, Sums in a cuboid
August 2009 (Contest VI)
Magic sequence, Bytelandian Robots, Curry Stained Napkin, Golf course
November 2009 (Contest X)
Help the DJ, The Best Box, The LCS Problem Revisited
March 2010 Contest
Treasure Hunting, K-important Strings, The Best Tower, Tri-Hexagonal Puzzle
May 2010 Contest
Nice Quadrangles, Rendezvous, Summing Slopes
October 2010 Challenge
Count palindromes, Logging Game
August Cook-off 2011
Vote for the Noodle Soup, Open the Dragon Scroll
March 2012 Challenge
Longest Weird Subsequence
April Challenge 2012
Stacking Pancakes, Greatest Dumpling Fight
May Cook-Off 2012
Little Elephant and Strings
June Challenge 2012
Little Elephant and Candies, Arranging Cup-cakes
July Challenge 2012
The Gray-Similar Code, Gift Rift
January Challenge 2013
The Minimum Number Of Moves
