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keith
Joined: 19 Sep 2005
Posts: 3355
Location: near Detroit, Michigan, USA
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 Posted: Sat Jul 01, 2006 11:30 am Post subject: DB Saturday Puzzle - July 1, 2006 |
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| Code: | Puzzle: DB070106 ******
+-------+-------+-------+
| 8 . . | 9 . . | . 5 . |
| 6 . . | 8 7 . | . 9 . |
| . 2 . | 4 . . | . 7 8 |
+-------+-------+-------+
| . . . | . . . | 1 . . |
| 4 1 . | 6 . 3 | . 8 2 |
| . . 8 | . . . | . . . |
+-------+-------+-------+
| 7 6 . | . . 9 | . 4 . |
| . 8 . | . 6 4 | . . 7 |
| . 3 . | . . 7 | . . 5 |
+-------+-------+-------+ |
Seems to need a chain ...
Keith |
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ravel
Joined: 21 Apr 2006
Posts: 536
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| Posted: Sat Jul 01, 2006 12:42 pm Post subject: |
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| Code: | *-----------------------------------------------------------*
| 8 47 17 | 9 3 12 | 24 5 6 |
| 6 45 3 | 8 7 25 | 24 9 1 |
| 15 2 9 | 4 15 6 | 3 7 8 |
|-------------------+-------------------+-------------------|
| 2 579 6 | 57 45 8 | 1 3 49 |
| 4 1 57 | 6 9 3 | 57 8 2 |
| 3 579 8 | 1257 1245 15 | 57 6 49 |
|-------------------+-------------------+-------------------|
| 7 6 12 | 125 125 9 | 8 4 3 |
| 15 8 125 | 3 6 4 | 9 12 7 |
| 9 3 4 | 12 8 7 | 6 12 5 |
*-----------------------------------------------------------*
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There is a nice uniqueness elimination, which does not help much:
r4c4=5 => r4c2=7 => r5c3=5 => deadly pattern 12 in cells r78c3, r79c4, r89c8.
Coloring in 5 (4 strong links) solves it. |
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