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Nov 8 DB

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Earl

Joined: 30 May 2007
Posts: 677
Location: Victoria, KS

Posted: Fri Dec 05, 2008 6:48 pm Post subject: Nov 8 DB

I found the Nov 8 DB, which is a one-step coloring (1).

Earl

Code:

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

Play this puzzle online at the Daily Sudoku site

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Sat Dec 06, 2008 9:45 pm Post subject:

Code:

.------------------.------------------.------------------.
| 5 78 9 | 12 4 6 | 1278 17 3 |
| 167 678 2 | 3 89 79 | 1478 5 47 |
| 4 378 1378 | 12 58 57 | 1278 6 9 |
:------------------+------------------+------------------:
| 13 358 6 | 57 2 38 | 1479 1479 47 |
| 2 9 15 | 567 56 4 | 17 3 8 |
| 37 3478 3478 | 9 1 38 | 5 2 6 |
:------------------+------------------+------------------:
| 8 2 34 | 56 3569 59 | 3479 479 1 |
| 379 1 37 | 4 39 2 | 6 8 5 |
| 369 3456 345 | 8 7 1 | 349 49 2 |
'------------------'------------------'------------------'

an alternative to the skyscraper is the w-wing on {1,7} strong link on 7 in column 9. removes 1's in r123c7

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