# Chess Sudoku

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## What is Chess Sudoku?

Chess sudoku refers to a wide variety of sudoku types that include chess items, usually depending on additional parameters but sometimes also depending on the size and shape of the grid.

For most variations, the standard sudoku rules apply (each 3 × 3 blocks, 9 cell row, and 9 cell columns must contain numbers 1 to 9 only once). Additional restrictions are added when numbers may appear with the movement of various pieces of chess.

This flow of different pieces of chess results in a number of different cheeses sudoku, including:

## Knight’s sudoku

Knight’s sudoku is one of the most popular forms of chess sudoku.

In addition to the general rules of sudoku, in this case, the same number cannot appear within the ‘knight’s movement’ itself. That is, the same number cannot appear in two straight cells and one cell in a horizontal position and cannot appear in one cell or two cells in a different direction.

This method creates an ‘L’ shape is shown below.

The departure of the knight in Sudoku

If you look at all the other possible cells within the ‘knight movement’ of the center cell, it means that in the movement of the knight chess sudoku, any number from the center cell blue below, cannot appear in any yellow cells.

The knight’s travel barrier

While the standard sudoku rules apply, any number from the center of the blue cell will not appear within the 3 × 3 square or any similar cells in the column or row.

These cells are eliminated by the standard rules of sudoku and are highlighted in yellow below the addition of cells removed by the knight’s barrier to movement.

The problem of going knight in chess sudoku

The action of the king sudoku

Another popular form of chess sudoku is where the ‘king’ limit is added.

In chess, the master is able to move to any nearby square (including diagonally). Therefore, in a different kind of chess sudoku, the same number cannot be transferred from one cell to another in its model whether it is in a different column, row, or 3 × 3 square.

In the diagram below, this means that any number from the blue cell will not appear again in any of the yellow cells.

The problem of the king’s custom

Also, standard sudoku rules and regulations apply. All cells or any number in the blue cell can reappear in it, according to the king’s motion of movement and the general rules of sudoku, highlighted in yellow below.

### Does Sudoku help in chess?

Yes, it does. In Chess, various moves of the knight or the king separate two cells from having the same digit. In Sudoku, there can be no consecutive digits in two adjacent orthogonal cells. It is perhaps understandable that it is often called Miracle Sudoku, as it starts with only two digits.

### Chess Sudoku Rules:

1.
Rules for Sudoku apply as usual.

2.
A digit cannot appear in two cells separated by a move of a knight or king (in
chess).

3.
There can be no consecutive digits in two adjacent orthogonal cells.