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Salsa #3

 
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Sun Jan 18, 2009 7:13 pm    Post subject: Salsa #3 Reply with quote

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== ===== =====

Can be solved using steps from ...

Basics: Naked/Hidden Single, Naked Pair/Triple, Locked Candidate 1/2

Basics+: Naked Quad, Hidden Pair/Triple/Quad

VH: BUG+1, Remote Pair, UR Type 1, X-Wing, XY-Wing

Advanced: 2-String Kite, Empty Rectangle, Skyscraper, UR Type 2, XYZ-Wing

Extreme: finned X-Wing, Multiple Colors, M-Wing, W-Wing, XY-Chain

VH+AE: multi-step VH plus one Advanced and/or one Extreme step.

Extreme+: Swordfish, Jellyfish, (but mostly) Chain
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Marty R.



Joined: 12 Feb 2006
Posts: 5165
Location: Rochester, NY, USA

PostPosted: Wed Jan 21, 2009 5:41 pm    Post subject: Reply with quote

This might be my toughest DAJ puzzle. I'm stuck and usually when that happens, Extended Medusa will bail me out, but not here.

Code:

+-----------+----------------+--------------+
| 7 5   6   | 2    8    1    | 3    9   4   |
| 9 134 13  | 3456 3467 3567 | 8    2   15  |
| 2 134 8   | 345  34   9    | 15   6   7   |
+-----------+----------------+--------------+
| 1 237 235 | 8    467  3567 | 9    347 356 |
| 8 37  35  | 1346 9    3567 | 1567 347 2   |
| 6 9   4   | 35   1237 2357 | 157  8   135 |
+-----------+----------------+--------------+
| 3 126 12  | 7    126  8    | 4    5   9   |
| 5 8   7   | 9    36   4    | 2    1   36  |
| 4 126 9   | 136  5    236  | 67   37  8   |
+-----------+----------------+--------------+

Play this puzzle online at the Daily Sudoku site
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Wed Jan 21, 2009 6:02 pm    Post subject: Reply with quote

I shouldn't have posted this puzzle. It's a nightmare and unreasonable to solve manually! My apologies!!!
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

PostPosted: Wed Jan 21, 2009 8:30 pm    Post subject: Reply with quote

daj95376 wrote:
I shouldn't have posted this puzzle. It's a nightmare and unreasonable to solve manually! My apologies!!!


I like it. It does use stuff not usually used here though.

Marty missed a hidden pair which will expose an xyz-wing.

That leaves a color or swordfish on 1s.

Then there is a 4 cell xy-chain.

Next, a finned x-wing. Edited to say: that is a sashimi x-wing / finned skyscraper. Smile

This cleans up to a 4-cell ALS. Very close to a 4-cell xy-chain it appears to me.

Thanks!
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storm_norm



Joined: 18 Oct 2007
Posts: 1741

PostPosted: Wed Jan 21, 2009 8:58 pm    Post subject: Reply with quote

Code:
.---------------------.---------------------.---------------------.
| 7      5      6     | 2      8      1     | 3      9      4     |
| 9      134    13    | 3456   3467   3567  | 8      2      15    |
| 2      134    8     | 345    34     9     | 15     6      7     |
:---------------------+---------------------+---------------------:
| 1      237    235   | 8      3467   3567  | 9      347    356   |
| 8      37     35    | 13456  9      3567  | 1567   347    2     |
| 6      9      4     | 135    12     2357  | 157    8      135   |
:---------------------+---------------------+---------------------:
| 3      6      12    | 7      12     8     | 4      5      9     |
| 5      8      7     | 9      36     4     | 2      1      36    |
| 4      12     9     | 136    5      236   | 67     37     8     |
'---------------------'---------------------'---------------------'

skipping the swordfish...
(7=3)r9c8 - (3)r9c46 = (3)r8c5 - (3=4)r3c5 - (4)r4c5 = (4)r4c8; r4c8 <> 7
(6=7)r9c7 - (7)r56c7 = (7)r5c8 - (7)r5c2 = (7-2)r4c2 = (2-1)r9c2 = (1)r9c4; r9c4 <> 6
(6)r4c9 = (6)r8c9 - (6=3)r8c5 - (3=1)r9c4 - (1)r7c5 = (1)r6c5 - (1)r5c4 = (1)r5c7; r5c7 <> 6
(3=5)r5c3 - (5)r5c7 = (5)r3c7 - (5=4)r3c4 - (4)r5c4 = (4)r5c8; r5c8 <> 3
(5=6)r2c6 - (6)r5c6 = (6-1)r5c4 = (1-5)r5c7 = (5)r3c7; r2c9 <> 5
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.

PostPosted: Wed Jan 21, 2009 9:36 pm    Post subject: Reply with quote

Daj, your puzzles may miss category and yet be dandy!

Pretty too, maybe a manta, tail a bit short. Smile
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Marty R.



Joined: 12 Feb 2006
Posts: 5165
Location: Rochester, NY, USA

PostPosted: Wed Jan 21, 2009 10:24 pm    Post subject: Reply with quote

Quote:
Marty missed a hidden pair which will expose an xyz-wing.

That is indeed an embarrassment, but thanks for pointing it out. Not that I can spot hidden pairs, but I usually catch the complementary pairs, triples, quads, etc. Embarassed Embarassed
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daj95376



Joined: 23 Aug 2008
Posts: 3855

PostPosted: Wed Jan 21, 2009 10:26 pm    Post subject: Reply with quote

wapati wrote:
Daj, your puzzles may miss category and yet be dandy!

Well, it isn't that the puzzle missed the categories listed. It's more like it abused them.

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

 r4  b4  Locked Candidate 1              <> 2    [r4c56]

   c5    Naked  Quad                     <> 3467 [r67c5]

         Swordfish c359\r267             <> 1    [r2c2],[r6c47]   -or-
         Swordfish r356\c247             <> 1    [r2c2],[r6c47]

         XYZ-Wing [r3c4]/[r3c5]+[r6c4]   <> 3    [r2c4]   extraneous

         Sashimi X-Wing r68\c59          <> 3    [r4c5]   extraneous

Code:
 +-----------------------------------------------------------------------+
 |  7      5      6      |  2      8      1      |  3      9      4      |
 |  9      34     13     |  456    3467   3567   |  8      2      15     |
 |  2      134    8      |  345    34     9      |  15     6      7      |
 |-----------------------+-----------------------+-----------------------|
 |  1      237    235    |  8      467    3567   |  9      347    356    |
 |  8      37     35     |  13456  9      3567   |  1567   347    2      |
 |  6      9      4      |  35     12     2357   |  57     8      135    |
 |-----------------------+-----------------------+-----------------------|
 |  3      6      12     |  7      12     8      |  4      5      9      |
 |  5      8      7      |  9      36     4      |  2      1      36     |
 |  4      12     9      |  136    5      236    |  67     37     8      |
 +-----------------------------------------------------------------------+

 -3r6c4  5r6c4  7r6c7  6r9c7  3r8c9  [XY-Chain] <> 3 [r6c9]

   c9    Naked  Pair                     <> 15   [r4c9]
 r6  b5  Locked Candidate 2              <> 3    [r4c6],[r5c46]

         Empty Rectangle/2-String Kite   <> 5    [r6c4]

Code:
 *-----------------------------------------------------------*
 | 7     5     6     | 2     8     1     | 3     9     4     |
 | 9     34    13    | 456   3467  3567  | 8     2     15    |
 | 2     134   8     | 45    34    9     | 15    6     7     |
 |-------------------+-------------------+-------------------|
 | 1     237   235   | 8     467   567   | 9     347   36    |
 | 8     37    35    | 1456  9     567   | 1567  347   2     |
 | 6     9     4     | 3     12    257   | 57    8     15    |
 |-------------------+-------------------+-------------------|
 | 3     6     12    | 7     12    8     | 4     5     9     |
 | 5     8     7     | 9     36    4     | 2     1     36    |
 | 4     12    9     | 16    5     236   | 67    37    8     |
 *-----------------------------------------------------------*

 -4r2c2  3r2c2  1r2c3  2r7c3  1r7c5  6r9c4  3r8c5  4r3c5  [XY-Chain] <> 4 [r2c45],[r3c2]

Code:
 *-----------------------------------------------------------*
 | 7     5     6     | 2     8     1     | 3     9     4     |
 | 9     4     13    | 56    367   3567  | 8     2     15    |
 | 2     13    8     | 45    34    9     | 15    6     7     |
 |-------------------+-------------------+-------------------|
 | 1     237   235   | 8     467   567   | 9     347   36    |
 | 8     37    35    | 1456  9     567   | 1567  347   2     |
 | 6     9     4     | 3     12    257   | 57    8     15    |
 |-------------------+-------------------+-------------------|
 | 3     6     12    | 7     12    8     | 4     5     9     |
 | 5     8     7     | 9     36    4     | 2     1     36    |
 | 4     12    9     | 16    5     236   | 67    37    8     |
 *-----------------------------------------------------------*

 -6r2c4  5r2c4  4r3c4  3r3c5  6r8c5  [XY-Chain] <> 6 [r2c5],[r9c4]
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