The Math Genius Who Gave Us Sudoku By AMY ELLIS NUTT Leonhard Euler's math discoveries extend to astronomy, ballistics, optics, music theory, fluid dynamics, mapmaking, shipbuilding — and Sudoku. In the spring of 1727, two weeks after the body of Isaac Newton was laid to rest in London's Westminster Abbey, an obscure 19-year-old mathematician by the name of Leonhard Euler left his home in Basel, Switzerland, to take up an academic position in St. Petersburg, Russia.When he died there in 1783 at the age of 76, Euler (pronounced "oiler'') had become the most prolific scientific writer in...