An early crop of Sudoku
Friday, March 24th, 2006The invention of the puzzle we now call Sudoku is generally credited to Howard Garns, an architect from Indianapolis. His first puzzles, which were known then as Number Place, were published in 1979. But now a curious precedent has turned up. More than 20 years earlier, in the 1950s, W. U. Behrens of Hannover, Germany, […]