The World Puzzle Federation is an international organization dedicated to puzzles. It follows the Olympic standard, and brings together puzzlers from around the world for the annual World Puzzle Championship (WPC). more »

The 5th World Sudoku Championship was held from April 29 to May 2 in Philadelphia, USA. In the individuals, Jakub Ondroushek from the Czech Republic looked like he was going to challenge Poland's Jan Mrozowski's lead as Jan had some restarts in the middle, but Jan rushed through the last three puzzles to retain the individual title of World's Greatest Sudoku Solver. In the team rounds, Germany was trailing in third place behind the Czech Republic after the second day of individuals, but an excellent Pentathlon score from them allowed them to take the lead and win the team first-place trophy. See the detailed Individual and Team Results.