九宫格数独，是一种源自18世纪末的瑞士，后在美国发展、并在日本得以发扬光大的数字谜题。数独盘面是个九宫，每一宫又分为九个小格。在这八十一格中给出一定的已知数字和解题条件，利用逻辑和推理，在其他的空格上填入1-9的数字。使1-9每个数字在每一行、每一列和每一宫中都只出现一次。这种游戏全面考验做题者观察能力和推理能力，虽然玩法简单，但数字排列方式却千变万化，所以不少教育者认为数独是训练头脑的绝佳方式。-Jiugongge Sudoku, is a Swiss from the 18th century, the latter in the U.S. and Japan to carry forward the number of puzzles. Sudoku disk is Jiu Gong, every house is divided into nine small cells. In an eighty given a grid of known numbers and problem solving certain conditions, the use of logic and reasoning, the spaces fill in other numbers 1-9. So that each number 1-9 in each row, each column and each palace only once. Comprehensive test of this game who do title of observation and reasoning, although the gameplay is simple, but the number is ever-changing arrangement, therefore, many educators think that Sudoku is a great way to train the mind.