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The rules for sudoku are simple. A [tex]$6 \times 6$[/tex] square must be filled in with numbers from 1 to 6 with no repeated numbers in each line, horizontally or vertically. Each row and column must contain all the digits from 1 to 6.

\begin{tabular}{|l|l|l|l|l|l|}
\hline
& 2 & & 3 & 6 & \\
\hline
& & & 5 & & 2 \\
\hline
1 & 5 & & & & 4 \\
\hline
2 & & 3 & 1 & 5 & 6 \\
\hline
4 & 3 & & 6 & 1 & \\
\hline
6 & 1 & & 4 & 2 & \\
\hline
\end{tabular}


Sagot :

To solve the given Sudoku puzzle, we need to fill in the blank cells such that every row and column contains all the digits from 1 to 6 exactly once.

Here is the grid with empty cells:
[tex]\[ \begin{array}{|c|c|c|c|c|c|} \hline & 2 & & 3 & 6 & \\ \hline & & & 5 & & 2 \\ \hline 1 & 5 & & & & 4 \\ \hline 2 & & 3 & 1 & 5 & 6 \\ \hline 4 & 3 & & 6 & 1 & \\ \hline 6 & 1 & & 4 & 2 & \\ \hline \end{array} \][/tex]

Let's fill in the empty cells step-by-step.

Step 1: Fill in the first row.

In the first row:
[tex]\[ \_ \quad 2 \quad \_ \quad 3 \quad 6 \quad \_ \][/tex]

The missing numbers are 1, 4, and 5. To find where these can go:
1. 1 cannot go in the second or fifth column (No repetitions).
2. 4 cannot go in the second or fourth column.
3. 5 cannot go in the fifth column.

So, fill these in accordingly:
[tex]\[ 1 \quad 2 \quad 5 \quad 3 \quad 6 \quad 4 \][/tex]

Step 2: Fill in the second row.

In the second row:
[tex]\[ \_ \quad \_ \quad \_ \quad 5 \quad \_ \quad 2 \][/tex]

The missing numbers are 1, 3, 4, and 6. Place them considering restrictions.
1. 1 cannot go in the fifth or sixth column.
2. 3 cannot go in the second or fourth column.
3. 4 cannot go in the fourth column.
4. 6 cannot go in the sixth column.

So, the second row now becomes:
[tex]\[ 3 \quad 4 \quad 6 \quad 5 \quad 1 \quad 2 \][/tex]

Step 3: Fill in the third row.

In the third row:
[tex]\[ 1 \quad 5 \quad \_ \quad \_ \quad \_ \quad 4 \][/tex]

The missing numbers are 2, 3, and 6.
1. 2 cannot go in the first or second columns.
2. 3 cannot go in the first or second columns.
3. 6 cannot go in the sixth column.

Thus, the third row becomes:
[tex]\[ 1 \quad 5 \quad 2 \quad 6 \quad 3 \quad 4 \][/tex]

Step 4: The fourth row is already complete.

[tex]\[ 2 \quad \_ \quad 3 \quad 1 \quad 5 \quad 6 \][/tex]
Missing number: 4.

Thus the fourth row becomes:
[tex]\[ 2 \quad 4 \quad 3 \quad 1 \quad 5 \quad 6 \][/tex]

Step 5: Fill in the fifth row.

In the fifth row:
[tex]\[ 4 \quad 3 \quad \_ \quad 6 \quad 1 \quad \_ \][/tex]

The missing numbers are 2 and 5.
1. 2 cannot go in the first, second, or fourth column.
2. 5 cannot go in the fourth column.
So, the fifth row becomes:
[tex]\[ 4 \quad 3 \quad 2 \quad 6 \quad 1 \quad 5 \][/tex]

Step 6: Fill in the sixth row.

In the sixth row:
[tex]\[ 6 \quad 1 \quad \_ \quad 4 \quad 2 \quad \_ \][/tex]

The missing numbers are 3 and 5.
Thus the sixth row becomes:
[tex]\[ 6 \quad 1 \quad 5 \quad 4 \quad 2 \quad 3 \][/tex]

Now the complete sudoku puzzle is:
[tex]\[ \begin{array}{|c|c|c|c|c|c|} \hline 1 & 2 & 5 & 3 & 6 & 4 \\ \hline 3 & 4 & 6 & 5 & 1 & 2 \\ \hline 1 & 5 & 2 & 6 & 3 & 4 \\ \hline 2 & 4 & 3 & 1 & 5 & 6 \\ \hline 4 & 3 & 2 & 6 & 1 & 5 \\ \hline 6 & 1 & 5 & 4 & 2 & 3 \\ \hline \end{array} \][/tex]