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Salsa #5 -- Extreme

 
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daj95376



Joined: 23 Aug 2008
Posts: 3854
PostPosted: Sat Feb 07, 2009 12:28 am    Post subject: Salsa #5 -- Extreme Reply with quote
Into each life a little Salsa must fall -- especially if you skip using XY-Chains.

Extreme Hint wrote:
Jellyfish!

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== Ratings are Accumulative

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

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

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

VH+: 2-String Kite, Empty Rectangle, Remote Pair, Skyscraper, Colors, UR Type 2

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

Extreme: Jellyfish, (but mostly) Chain
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wapati



Joined: 10 Jun 2008
Posts: 472
Location: Brampton, Ontario, Canada.
PostPosted: Sat Feb 07, 2009 5:04 am    Post subject: Reply with quote
Very Happy

Well, I like the big fish. A few more "tricks" and then I had to look at this one through a solver. A great big ALS got me past the logjam and back to stuff I can do on paper. Whew! Tough puzzle Dan!
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storm_norm



Joined: 18 Oct 2007
Posts: 1741
PostPosted: Sat Feb 07, 2009 6:12 pm    Post subject: Reply with quote
this grid is after the big jellyfish
on 5

Code:
.---------------------.---------------------.---------------------.
| 1     67-8    4     |W258    3789   2379  |W58     39     3569  |
| 67     9      578   | 4      1378   137   | 158    2      356   |
| 2     W58     3     | 6     W1589  W159   | 7      19     4     |
:---------------------+---------------------+---------------------:
| 359    2      1     | 7      359    359   | 4      6      8     |
| 3679  367-8  57-8   |W58     4      1369  | 2      139   W359   |
| 3469   3468  W58    |25-8   13-89   12369 |W15     7     W359   |
:---------------------+---------------------+---------------------:
| 57     57     6     | 3      2      8     | 9      4      1     |
| 8      1      2     | 9      6      4     | 3      5      7     |
| 34     34     9     | 1      57     57    | 6      8      2     |
'---------------------'---------------------'---------------------'

two w-wings with grouped strong links finish it.
1...(8=5)r3c2 - (5)r3c56 = (5)r1c4 - (5=8)r1c7; r1c2 <> 8
2...(8=5)r6c3 - (5)r6c79 = (5)r5c9 - (5=8)r5c4; r5c23|r6c45 <> 8

I am still looking to skip the jellyfish.
---
ok, back and found a two stepper that skips the jellyfish

Code:
.------------------------.------------------------.------------------------.
| 1       5678    4      | 258     35789   23579  | 58      39      3569   |
| 567     9       578    | 4       13578   1357   | 158     2       356    |
| 2       58      3      | 6       1589    159    | 7       19      4      |
:------------------------+------------------------+------------------------:
| 359     2       1      | 7       359     359    | 4       6       8      |
| 35679   35678   578    | 58      4       13569  | 2       139     359    |
| 34569   34568   58     | 258     13589   123569 | 15      7       359    |
:------------------------+------------------------+------------------------:
| 57      57      6      | 3       2       8      | 9       4       1      |
| 8       1       2      | 9       6       4      | 3       5       7      |
| 34      34      9      | 1       57      57     | 6       8       2      |
'------------------------'------------------------'------------------------'

1... {5,8}w-wing grouped link on 5
(8=5)r6c3 - (5)r6c79 = (5)r5c9 - (5=8)r5c4; r5c23|r6c45 <> 8

2... this starts out like a generalized m-wing
(5=1)r6c7 - (1)r5c8 = (1-6)r5c6 = (6-2)r6c6 = (2)r6c4; r6c4 <> 5
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