Sudoku

HOMAS Snyder, a student at Harvard University in the US, become world sudoku champion in Prague when he beat Japan's Yuhei Kusui in the head-to-head final round.Mr Snyder, 27, who was runner-up in the first world championships of the popular numerical logic game last year, scored 162 against Kusei's 135 points in the final session of the three-day event in which 141 of the world's best players took part.