![]() Over time, and with each subsequent game, you will build your own set of logical tools that will allow you to efficiently and quickly solve the next, more difficult puzzles. Remember that you should not guess - all the information you need to complete the game are on the board. These principles and guidelines will be enough for you to solve easier Sudoku boards and will be useful for solving higher difficulty boards. The only possibility for this cell is the number 4.Įvery correctly filled cell is a key to solving the next, unfilled cells and the whole Sudoku board. Consider the options that we have to reject: numbers 1, 5, 6, 7 and 8 have already been placed in the 3 x 3 square numbers 2 and 9 can not be inserted due to their presence in the same row 3 also can not be used because it is already in the same column. At first glance you can not see that only one digit can be inserted in the highlighted cell. This cell has been highlighted in the picture.įinally, let's look at whole board. The following section illustrates a situation in which the digit 9 may be placed in only one cell in a square. Often it is necessary to combine information from 3 x 3 squares, rows and columns. The only cell of the square where number 1 can be placed has been highlighted in the picture. We also know that each 3 x 3 square must include all digits, so we must also place number 1 in the central square. Since, as we know from the rules of Sudoku, every digit can only appear once in each row, number 1 cannot be placed in any other cell in the first and third rows. ![]() The square on the right side contains number 1 in the first row. The square on the left contains number 1 in the third row. The picture below is a section of a line of 3 x 3 squares of the sample board. Read them keeping in mind the rules of Sudoku mentioned above. We will provide you with some basic guidelines so that you can solve your first puzzles faster on the example of Sudoku board number 1121552. To solve the Sudoku puzzle you do not have to guess each digit - just follow the simple rules of logic. Similarly, digits cannot repeat in any of the nine 3 x 3 squares. Each digit can appear only once in each row and each column of the board. Place the numbers 1-9 once in each row, column and 3x3 bold-lined box of the grid. ![]() Your task is to fill all the cells of the board with numbers from 1 to 9. A square board is divided into nine identical 3 x 3 squares - there are nice cells in each of them. ![]()
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