Everyone needs a hobby. For Lee Hsien Loon, that happens to be writing C++ Sudoku solvers and publishing them on the Internet. Lee Hsien Loong also happens to be the Prime Minister of Singapore. His ...

— -- Math has helped place a man on the moon and has counted the genes in our DNA. But never mind all that. A mathematician says he has finally produced something that people really care about: a ...

It seems like everyone with Sudoku fever has the same story: They stumble upon it accidentally in some book or newspaper, play it once or twice to test their skill and ride the slippery slope into ...