A 9x9 sudoku puzzle...

...and the solution (the numbers in red have been added to the grid)

Lua error in Module:Unicode_data at line 293: attempt to index local 'data_module' (a boolean value). (sometimes spelled as Su Doku, but also called Number Place or Nanpure) is a puzzle that is very popular in Japan. It was created in Indianapolis in 1979 by Howard Garns and it appeared in Dell Magazines afterwards.