dailysudoku.com Forum Index dailysudoku.com
Discussion of Daily Sudoku puzzles
 
 FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Salsa #3

 
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj
View previous topic :: View next topic  
Author Message
daj95376



Joined: 23 Aug 2008
Posts: 3854
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
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
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
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
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!!!
Back to top
View user's profile Send private message
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!
Back to top
View user's profile Send private message
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
Back to top
View user's profile Send private message
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
Back to top
View user's profile Send private message
Marty R.



Joined: 12 Feb 2006
Posts: 5770
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
Back to top
View user's profile Send private message
daj95376



Joined: 23 Aug 2008
Posts: 3854
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]
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    dailysudoku.com Forum Index -> Puzzles by daj All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum


Powered by phpBB © 2001, 2005 phpBB Group