What is the formula of Jiugong abacus?

Formula: "Don't forget to fill in the middle of the rising line in turn; Put it down when you go up and down the box, and turn left when you leave the box right; The weight is filled in the box below, as is the upper right row. " This formula is not only applicable to the nine palaces, but also to the promotion of odd-numbered nine palaces, such as the five-five diagram and the seven-seven diagram.

Xu Yue's Shu Shu Ji Yi in the Han Dynasty: "Counting the nine palaces, the five elements are similar to the cycle." In the Northern Zhou Dynasty, Zhen Luan wrote: "Nine palaces, that is, two or four are shoulders, six or eight are feet, three are left and seven are right, nine are worn, and five are in the middle." If we allow this, we can get the "Jiugong Calculation Diagram".

Game part

The first one is on a 3×3 grid. Eight small wooden blocks from 1 to 8 are randomly placed, and the numbers around each space can be moved into the space. Players should rearrange the small blocks in the order of 12345678, and whoever spells the result with the least number of moves will win.

The second game, such as Jiugongge Arithmetic Game, promotes the arrangement of eight numbers in a wooden lattice with three squares in both directions, so that the sum of the three numbers on the two diagonal lines of each row and column is equal to 15. While calculating, we must also think about how to push the number box to the corresponding position. This game not only tests people's numerical reasoning ability, but also tests people's thinking logic ability.