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daj95376
Joined: 23 Aug 2008
Posts: 3854
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 Posted: Mon May 02, 2011 8:53 pm Post subject: Puzzle 11/05/02: ~ Difficult |
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| Code: | +-----------------------+
| . . . | 9 . . | 6 5 . |
| . 9 . | . 6 7 | 3 . 2 |
| . . 5 | . . . | . . 7 |
|-------+-------+-------|
| 5 . . | 3 . 4 | . . . |
| . 4 . | . 2 . | . 3 . |
| . 2 . | 1 . 6 | . . 4 |
|-------+-------+-------|
| 6 5 . | . . . | 4 . . |
| 1 . . | . 4 . | . 7 . |
| . 3 4 | . . 5 | . . 1 |
+-----------------------+
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Play this puzzle online at the Daily Sudoku site |
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tlanglet
Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills
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| Posted: Tue May 03, 2011 1:17 pm Post subject: |
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A standard pattern with a twist.....
| Quote: | w-wing (79)r4c5|r5c1 with SL(9)r9c158; r5c4<>7
(9)r9c1-(9=7)r5c1;
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(9)r9c5-(9=7)r4c5;
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(9)r9c8-r46c8=r4c9-(9=7)r4c5;
I believe that this pattern could also be viewed as a Kraken row.
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Ted |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed May 04, 2011 4:56 am Post subject: |
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| Other than a couple of non-productive moves, I couldn't do anything with this except Medusa, and a couple of traps did the job. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Wed May 04, 2011 6:16 am Post subject: |
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Marty,
FYI: here's my solver's solution. I don't think it will interfere with anyone else submitting a solution.
| Code: | after basics
+-----------------------------------------------------------------------+
| 4 7 23 | 9 13 123 | 6 5 8 |
| 8 9 1 | 5 6 7 | 3 4 2 |
| 23 6 5 | 4 38 238 | 9 1 7 |
|-----------------------+-----------------------+-----------------------|
| 5 1 789 | 3 79 4 | 278 2689 69 |
| 79 4 6 | 78 2 89 | 1 3 5 |
| 379 2 3789 | 1 5 6 | 78 89 4 |
|-----------------------+-----------------------+-----------------------|
| 6 5 279 | 278 13789 1389 | 4 289 39 |
| 1 8 29 | 26 4 39 | 5 7 369 |
| 279 3 4 | 2678 789 5 | 28 2689 1 |
+-----------------------------------------------------------------------+
# 57 eliminations remain
r5 b7 turbot fish/ER <> 7 r7c4
<29+3> XY-Wing r8c3/r1c3+r8c6 <> 3 r1c6 extraneous
<29+8> XYZ-Wing r7c8/r6c8+r9c7 <> 8 r9c8 extraneous
(6=9)r4c9 - (9=7)r4c5 - (7=8)r5c4 - (8=2)r7c4 - (2=6)r8c4 => r8c9<>6
+-----------------------------------------------------------------------+
| 4 7 23 | 9 13 12 | 6 5 8 |
| 8 9 1 | 5 6 7 | 3 4 2 |
| 23 6 5 | 4 38 238 | 9 1 7 |
|-----------------------+-----------------------+-----------------------|
| 5 1 789 | 3 b79 4 | 278 2689 a69 |
| 79 4 6 | c78 2 89 | 1 3 5 |
| 379 2 3789 | 1 5 6 | 78 89 4 |
|-----------------------+-----------------------+-----------------------|
| 6 5 279 | d28 13789 1389 | 4 289 39 |
| 1 8 29 | e26 4 39 | 5 7 39-6 |
| 279 3 4 | 2678 789 5 | 28 269 1 |
+-----------------------------------------------------------------------+
# 54 eliminations remain
c14 X-Wing <> 7 r9c5
r59c1 Skyscraper <> 9 r4c5,r8c6
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A 5-cell XY-Chain falls into the "Difficult" category. The turbot fish needed to set it up made the puzzle extra difficult.
Regards, Danny |
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Marty R.
Joined: 12 Feb 2006
Posts: 5770
Location: Rochester, NY, USA
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| Posted: Wed May 04, 2011 4:39 pm Post subject: |
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| Thanks Danny. I don't see a Turbot fish/ER, but was able to eliminate 7 from r7c4 via Finned X-Wing in rows 59. I also saw the XY- and XYZ-Wings. Of course, missing an XY-Chain is as easy as falling off a log. |
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daj95376
Joined: 23 Aug 2008
Posts: 3854
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| Posted: Thu May 05, 2011 12:15 am Post subject: |
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| Marty R. wrote: | | Of course, missing an XY-Chain is as easy as falling off a log. |
I've generated a new batch of puzzles to use once my current cache is empty. Also, starting with my next postings, I plan to return to using my rating system. Hopefully, this'll again help in dealing with my puzzles.
Regards, Danny |
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