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Earl
Joined: 30 May 2007
Posts: 677
Location: Victoria, KS
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 Posted: Sun Jan 06, 2008 10:39 pm Post subject: Jan 5 DB |
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Here is the Jan 5 DB
A skyscraper (7) did it for me.
Earl
| Code: |
+-------+-------+-------+
| . . . | . 3 6 | . . . |
| 9 . 3 | . . 5 | 4 . . |
| . 5 1 | . . . | 9 . . |
+-------+-------+-------+
| . . . | . 6 . | . 3 . |
| . . 8 | 2 . 3 | 5 . . |
| . 9 . | . 5 . | . . . |
+-------+-------+-------+
| . . 6 | . . . | 1 4 . |
| . . 4 | 3 . . | 2 . 8 |
| . . . | 6 1 . | . . . |
+-------+-------+-------+
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Play this puzzle online at the Daily Sudoku site |
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Johan
Joined: 25 Jun 2007
Posts: 206
Location: Bornem Belgium
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| Posted: Sun Jan 06, 2008 11:52 pm Post subject: |
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An Empty Rectangle in Box 6 for digit <7>, takes out <7> in R1C7 was the final step for me. The eri can see one of the strong link* on <7> in C3
| Code: |
+--------------------------+--------------------------+--------------------------+
| 248 2478 *27 | 9 3 6 |-[7]8 1 5 |
| 9 78 3 | 1 28 5 | 4 278 6 |
| 6 5 1 | 7 4 28 | 9 28 3 |
+--------------------------+--------------------------+--------------------------+
| 124 247 5 | 48 6 9 | 78 er 3 er 124 |
| 14 6 8 | 2 7 3 | 5 er 9 er 14 |
| 3 9 *27 | 48 5 1 | 6 eri 78 24 |
+--------------------------+--------------------------+--------------------------+
| 7 3 6 | 5 28 28 | 1 4 9 |
| 5 1 4 | 3 9 7 | 2 6 8 |
| 28 28 9 | 6 1 4 | 3 5 7 |
+--------------------------+--------------------------+--------------------------+ |
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storm_norm
Joined: 18 Oct 2007
Posts: 1741
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| Posted: Mon Jan 07, 2008 12:22 am Post subject: |
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UR type 2b {1,4} in r45c19 takes out 2 in r4c2
then xy-wing pincers in r1c3 and r9c2 28-78-27 takes out 7 in r1c2
of course the skyscraper is there to avoid all those steps. |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Mon Jan 07, 2008 1:36 am Post subject: |
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| Just another approach--I used the Type 1 UR on 28, then a W-Wing on 78, followed by pincer coloring on that same W-Wing. |
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