## It is a modarate puzzle, but I do not see the solution.

Post the puzzle or solving technique that's causing you trouble and someone will help

### It is a modarate puzzle, but I do not see the solution.

Here is the puzzle:

Code: Select all
`+-------+-------+-------+| . 8 . | . . . | . . . || 4 . 3 | 9 . 1 | . . . || . . . | 7 4 . | . . . |+-------+-------+-------+| . . , | 2 . . | . 4 . || 9 . . | . 6 7 | . . . || 7 1 4 | . . 9 | . . . |+-------+-------+-------+| . . . | . 2 8 | 1 . 9 || . 6 . | . . . | . . 4 || . . . | . . . | . 6 8 |+-------+-------+-------+`

It seem to be simple but, at this point I do not see the next step.

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`+-------------------+-----------+------------------+| 126   8    79     | 53  53 26 | 4    79     12   || 4     257  3      | 9   8  1  | 2567 257    256  || 1256  259  12569  | 7   4  26 | 2358 123589 1235 |+-------------------+-----------+------------------+| 68    35   68     | 2   1  35 | 9    4      7    || 9     235  25     | 4   6  7  | 358  1358   135  || 7     1    4      | 8   35 9  | 2356 235    2356 |+-------------------+-----------+------------------+| 35    4    57     | 6   2  8  | 1    357    9    || 12358 6    125789 | 135 79 35 | 2357 2357   4    || 1235  2579 12579  | 135 79 4  | 2357 6      8    |+-------------------+-----------+------------------+`

Who can explain ? Thank you.
danlm

Posts: 17
Joined: 03 April 2006

I can see a 7523 quad in c8, meaning r1c8 = 9
Bigtone53

Posts: 413
Joined: 19 September 2005

1st time I see a quad which solve the puzzle.

Thanks

danlm
danlm

Posts: 17
Joined: 03 April 2006

The hidden pair 18 in column 8 solves it also.

Code: Select all
`+-------------------+-----------+----------------------+| 126   8    79     | 53  53 26 | 4     79        12   || 4     257  3      | 9   8  1  | 2567  257       256  || 1256  259  12569  | 7   4  26 | 2358 (18)23589  1235 |+-------------------+-----------+----------------------+| 68    35   68     | 2   1  35 | 9     4         7    || 9     235  25     | 4   6  7  | 358  (18)35     135  || 7     1    4      | 8   35 9  | 2356  235       2356 |+-------------------+-----------+----------------------+| 35    4    57     | 6   2  8  | 1     357       9    || 12358 6    125789 | 135 79 35 | 2357  2357      4    || 1235  2579 12579  | 135 79 4  | 2357  6         8    |+-------------------+-----------+----------------------+`
wintder

Posts: 297
Joined: 24 April 2007

wintder wrote:The hidden pair 18 in column 8 solves it also.

Waow! To solve on this way, for me, is better !!
danlm

Posts: 17
Joined: 03 April 2006