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 Tricky sudoku (Posted on 2006-06-05)
A new version of Sudoku Puzzle.

In this version, like in a normal sudoku, numbers 1 to 9 appears only once in every row or column. But in the nine 3 X 3 subblocks any number, instead of appearing only once, appears either once or twice or not at all. In each subblock, three numbers appears once, three numbers appears twice & three numbers do not appear at all.

Considering this rule solve the sudoku puzzle given below.

```+---+---+---++---+---+---++---+---+---+
| 1 |   | 6 ||   | 7 |   || 2 |   | 8 |
+---+---+---++---+---+---++---+---+---+
|   | 1 |   || 7 |   | 2 ||   | 9 | 3 |
+---+---+---++---+---+---++---+---+---+
|   | 7 |   ||   |   | 4 ||   |   |   |
+===+===+===++===+===+===++===+===+===+
|   | 8 | 9 || 1 |   | 6 ||   |   | 2 |
+---+---+---++---+---+---++---+---+---+
| 5 |   |   || 3 |   |   ||   | 1 |   |
+---+---+---++---+---+---++---+---+---+
| 8 |   | 3 ||   |   | 7 ||   |   | 9 |
+===+===+===++===+===+===++===+===+===+
|   | 6 |   ||   | 9 |   || 8 | 3 |   |
+---+---+---++---+---+---++---+---+---+
| 2 |   | 1 ||   |   | 5 ||   |   | 7 |
+---+---+---++---+---+---++---+---+---+
| 9 |   |   || 8 |   | 3 ||   |   | 4 |
+---+---+---++---+---+---++---+---+---+
```

 See The Solution Submitted by Salil Rating: 4.1667 (6 votes)

Comments: ( Back to comment list | You must be logged in to post comments.)
 Solution Comment 7 of 7 |
`The required solution is as follows:1 3 6 5 7 9 2 4 86 1 8 7 5 2 4 9 33 7 5 6 2 4 9 8 14 8 9 1 3 6 5 7 25 9 2 3 4 8 7 1 68 5 3 4 6 7 1 2 97 6 4 2 9 1 8 3 52 4 1 9 8 5 3 6 79 2 7 8 1 3 6 5 4`

 Posted by K Sengupta on 2009-01-23 12:22:25

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