Sudoku is a well known logic-based placement puzzle. The objective is to fill the 9x9 grid so that each column, each row, and each of the nine 3x3 boxes contains the digits 1 to 9.

The puzzle setter provides a partially completed grid so that there is only one solution. At last a brain challenge as few do.

Sudoku first appeared in japanese newspapers at mid 80's. For first time ever Sudoku appears on MSX Home System computers now courtesy of Dvik & Joyrex.