April 2009 (Contest II)
A Christmas Pizza Puzzle, Packing the Boxes, Bubbles, Squash the Bugs, Spaghetti Monsters, Battleship V
May 2009 (Contest III)
Swapping mismatches, An interesting subsequence, The powerful sum, Prime words, Best board fill, Healthy dinner party
June 2009 (Contest IV)
The Lucky Draw, Alien Clock, Count the squares, Pack the balls in a box!, Primes in the GCD table, The battlefield, Product of divisors
July 2009 (Contest V)
Sums in a cuboid, Lights Off, Revisited!, Johny the farmer, The White Knight, Quadratic Equations, Lights Off, Buggy algorithm
August 2009 (Contest VI)
Crystals, Divide and conquer
December 2009 (Contest XI)
The N Queens Puzzle Revisited, Effective Sets, Palindromic Numbers, Maze of Digits, Plant Location
July Cook Off
The Black and White Knights
June Long Contest 2011
Mushroom Cave, Maximal Score Path, Chef Teams, Attack of the Clones, Minesweeper Reversed, Restock
July 2011 Long Contest
Wireless Network, Billboards, A-E Hash Function, Most Popular Friend
United States