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Set NNP_2 Puzzle 98

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Mon Feb 23, 2009 5:01 pm Post subject: Set NNP_2 Puzzle 98

Last puzzle of this set.

Code:

+-----------------------+
| 9 . 1 | . . . | 6 . 4 |
| . 5 . | 6 . . | . 1 . |
| 3 . 6 | . 1 . | 8 . 5 |
|-------+-------+-------|
| . 9 . | 8 . . | . . . |
| . . 5 | . . 4 | . . 8 |
| . . . | . 6 9 | . . 1 |
|-------+-------+-------|
| 5 . 8 | . . . | . . 3 |
| . 1 . | . . . | . . . |
| 7 . 9 | . 3 6 | 1 . . |
+-----------------------+

Play this puzzle online at the Daily Sudoku site

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Tue Feb 24, 2009 5:43 am Post subject:

Code:

.---------------------.---------------------.---------------------.
| 9 278 1 | 237 2578 23578 | 6 23 4 |
| 48 5 24 | 6 9 238 | 23 1 7 |
| 3 27 6 | 4 1 27 | 8 9 5 |
:---------------------+---------------------+---------------------:
| 1 9 247 | 8 257 2357 | 2347 2347 6 |
| 26 236 5 | 1 27 4 | 9 237 8 |
| 48 238 247 | 237 6 9 | 23457 23457 1 |
:---------------------+---------------------+---------------------:
| 5 26 8 | 9 247 1 | 47 467 3 |
| 26 1 3 | 27 2478 278 | 457 4567 9 |
| 7 4 9 | 5 3 6 | 1 8 2 |
'---------------------'---------------------'---------------------'

ER 2
then this move on 2...
r7c5 = r7c2 - r13c2 = r2c3 - r2c7 = r1c8; r1c5 <> 2
leaves r1c5 as {5,8}
can make this chain...
(2=3)r2c7 - (3)r4c7 = (3-5)r4c6 = (5)r4c5 - (5=8)r1c5 - (8)r1c2 = (8-4)r2c1 = (4)r2c3; r2c3 <> 2
singles follow.

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