Explanation of formula 1;
1, we usually ask 1-9 to fill in numbers in the nine squares, so that the sum of rows, columns and diagonals is equal and the numbers are not repeated.
In fact, there must be a formula when answering: 2 and 4 are shoulders; 6, 8 is enough; Up 9 down1; Left 7 right 3.
2 9 4
7 5 3
6 1 8
Formula 2: "Don't forget to fill in the middle of the ascending line in turn; Put it down when loading and unloading the box, and put it left when unloading the right box; The weight is filled in the box below, as is the upper right row. "This formula applies not only to Jiugong, but also to odd Jiugong in a broad sense, such as May 5th and July 7th.
Equation 2 explains:
If we encounter nine consecutive numbers, we can also use this formula, such as 55, 56, 57, 58, 59, 60, 6 1, 62, 63, and put them in nine squares. We can regard the smallest number as 1, that is, 55 as 1, 53.
56 63 58
6 1 59 57
60 55 62
Jiugongge is the "predecessor" of Sudoku, which originated in China. Thousands of years ago, our ancestors invented Luo Shu, which is more complicated than Sudoku now. It requires that the sum of the numbers in the vertical and horizontal directions is equal to 15, rather than a simple number of nine that cannot be repeated. Nine palace map in the Confucian classic "Book of Changes" also originated from this, so it is called "Luo Shu Nine palace map". Because of its important position in the history of China's cultural development, the name of "Nine Palaces" has been preserved to this day.