Sudoku is a number puzzle based on the Latin squares described by the 18th-century Swiss mathematician Euler. The modern version consists of a box divided into nine squares, each of which is again divided into nine smaller boxes, making 81 boxes in total. The puzzle setter provides a partially completed grid so that there is only one solution. The objective is to fill the grid so that every column, every row, and every 3×3 box contains the digits 1 through 9. What was sudoku originally called? Discuss
Source: The Free Dictionary