Japanese Tetsuya Nishio concentrates on

Lucca, ITALY: Japanese Tetsuya Nishio concentrates on an Sudoku grids 11 March 2006 in Lucca. About 85 players from around 22 nations compete on the first World Sudoku Championship (WSC1), held in the Italian town of Lucca, 80 km from Florence, with the support of the World Puzzle Federation. Puzzlers from around the world will have the chance to challenge each other in different variations of "the game of the year 2005" for the title of the true Sudoku Master WSC1. AFP PHOTO/ NICO CASAMASSIMA (Photo credit should read NICO CASAMASSIMA/AFP via Getty Images)