Philadelphia ? The defending champ in the World Sudoku Championships has retained his title and Germany has taken the team title.

Jan Mrozowski of Poland was among the 120 players from 32 countries in this year’s competition. The 23-year-old defended his 2009 title by solving 10 puzzles in a playoff round in a time of 54 minutes 4 seconds.

Germany had the highest score in the team division with 7,904 points.

The two-day competition that ended Saturday in Philadelphia marked the first time the event has taken place in the United States.