Formula: One person wears nine shoes, three on the left, seven on the right, two on four shoulders, six on eight feet and five in the middle. In fact, just remember that "24 has shoulders and 68 is enough". Make the sum of the vertical and horizontal lines equal to 15, which is one of the nine squares: 2 9 4.

7 5 3

6 1 8

When the above picture is rotated clockwise once, the following three change pictures can be obtained: 9 grid 2: 6 7 2.

1 5 9

8 3 4

Jiugong Gesan: 8 1 6

3 5 7

4 9 2

Jiugong Gesi: 4 3 8

9 5 1

2 7 6

But "24 has shoulders, 68 is enough" is just a shortcut to prompt the answer, not a specific solution. The specific parsing process is as follows: 1+14( 5/9 or 6/8) Effective combination: 1/5/9 and 1/6/8 2+13 (6/7 or 5/8 or 4/. 8) Effective combination: 3/5/7 and 3/4/8 4+1(3/8 or 2/9 or 5/6) Effective combination: 4/5/6 (*4/3/8 and *4/2/9 have been repeated, so it is deleted). Therefore, the effective combination that meets the conditions is the above eight groups. In the above eight groups of arrangements, 2, 4, 6, and 8 appear three times each (satisfying three lines of vertical and horizontal inclination), so you must live in the corner of Jiugongge (that is, shoulders and feet); 5 appears 4 times (four lines satisfying vertical and horizontal biclinics), so it is in the middle position. The problem of Jiugongge will be solved. A quick solution to Jiugongge is to fill in the number 1~9 in Jiugongge, so that the sum of three numbers on the horizontal, vertical and diagonal lines is equal. The following is a quick solution: 1) Fill the number 1~9 in nine squares in turn, 2) Rotate 1, 8, 9, 2 counterclockwise by one place, and 3) Rotate 3, 6, 7, 4 clockwise by one place. Fast solution of jiugongge