Basic rules of multiplayer games

The basic rules of multiplayer games are as follows:

1, cells and values: A Nil Sudoku puzzle usually contains 9x9=8 1 cells, and each cell can only fill in one value. For an unfinished Sudoku problem, some cells have been filled with values, while others are empty, waiting for the solver to finish it.

2. Rows and columns: Traditionally, horizontal rows and vertical columns are no exception here. A row consists of 9 horizontal cells and a column consists of 9 vertical cells. Obviously, the whole puzzle consists of 9 rows and 9 columns. To avoid confusion, capital letters and numbers are used here to represent rows and columns respectively. For example, cell [G6] refers to the cell located at the junction of row G and column 6, which has been filled with the value of 7.

Multiplayer game skills:

1. Block: The term block refers to nine adjacent cell groups starting from a specific location. In the above figure, blocks are represented by alternating background colors. For example, for the leftmost block, we represent it as from. Any row, column or block of a cell is a cell. Each cell must contain all but not duplicate numbers 1 to 9.

2. Many people think that the difficulty of Sudoku depends on the number of numbers already filled in the puzzle, but this is not the case. Generally speaking, the more numbers you fill in, the easier it is to solve the problem. In fact, however, there are many more topics with more numbers than those with fewer numbers. This requires other methods to determine the difficulty.

3. Application: One of the frequently used methods in application is to see which Sudoku skills are needed to solve a Sudoku problem. A very simple topic may only use the most basic skills. Relatively complex problems may require very advanced problem-solving methods. It is more objective to set the difficulty of the game in this way.