Dr. SudokuSudoku originally called Number Place, is a logic-based, combinatorial number-placement puzzle. The objective is to fill a 9×9 grid with digits so that each column, each row, and each of the nine 3×3 sub-grids that compose the grid contains all of the digits from 1 to 9. The puzzle setter provides a partially completed grid, which for a well-posed puzzle has a unique solution.Completed puzzles are always a type of Latin square with an additional constraint on the contents of individual regions. For example, the same single integer may not appear twice in the same row, column or in any of the nine 3×3 subregions of the 9x9 playing board.SUD Inc. 数独博士数独最初叫号广场，是基于逻辑的，组合数 - 安置的难题。其目的是，以填补9×9网格位数，使得每一列，每行，每九个3×3子网格组成该网格包含的所有的数字从1到9的难题设定器提供了一个部分完成的网格，这对于一个适定的拼图有一个独特的解决方案。完成拼图总是对个别地区的内容的附加约束的类型拉丁方的。例如，同样的一个整数可能不在同一行，列，或以任何的9x9的打板的9 3×3子区域出现两次。SUD公司