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Set J Puzzle 16 -- VH+

dailysudoku.com Forum Index -> Puzzles by daj

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daj95376

Joined: 23 Aug 2008
Posts: 3854

Posted: Sun Feb 01, 2009 10:27 am Post subject: Set J Puzzle 16 -- VH+

Code:

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

Play this puzzle online at the Daily Sudoku site

===== ===== ===== ===== ===== ===== ===== ===== ===== Ratings

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, 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

tlanglet

Joined: 17 Oct 2007
Posts: 2468
Location: Northern California Foothills

Posted: Sun Feb 01, 2009 9:22 pm Post subject:

Here is my code after basics.

Code:

*-----------------------------------------------------------*
| 6 5 2 | 1 4 9 | 38 378 378 |
| 4 8 37 | 357 367 2 | 56 9 1 |
| 1 37 9 | 3578 3678 57 | 256 25 4 |
|-------------------+-------------------+-------------------|
| 357 347 45 | 9 278 6 | 238 1 2378 |
| 9 6 378 | 278 5 1 | 4 2378 2378 |
| 2 1 78 | 4 78 3 | 9 6 5 |
|-------------------+-------------------+-------------------|
| 357 347 45 | 2357 9 8 | 1 235 6 |
| 3578 9 1 | 6 237 57 | 2358 4 238 |
| 358 2 6 | 35 1 4 | 7 358 9 |
*-----------------------------------------------------------*

I wandered around for seven (Yes, I do mean 7) steps to finish this the first time, but I am going to try for something shorter (one day).

Quote:

Multi-coloring <2>,
ER <5> then ER <7>,
xy-wing <357> or a w-wing <37> provide the identical resultant deletions,
xy-wing <678>,
xyz-wing <357>,
and another ER <7>

I do enjoy these types of puzzles..........

Ted

storm_norm

Joined: 18 Oct 2007
Posts: 1741

Posted: Mon Feb 02, 2009 1:50 am Post subject:

Code:

.------------------.------------------.------------------.
| 6 5 2 | 1 4 9 | 38 378 378 |
| 4 8 37 | 357 367 2 |*56 9 1 |
| 1 37 9 | 3578 3678 *57 |*256 *25 4 |
:------------------+------------------+------------------:
| 357 347 45 | 9 278 6 | 238 1 2378 |
| 9 6 378 | 278 5 1 | 4 2378 2378 |
| 2 1 78 | 4 78 3 | 9 6 5 |
:------------------+------------------+------------------:
| 357 347 45 | 2357 9 8 | 1 235 6 |
| 3578 9 1 | 6 237 *57 |23-58 4 238 |
| 358 2 6 | 35 1 4 | 7 358 9 |
'------------------'------------------'------------------'

the ER 5 removes 5 from r8c7

Code:

.------------------.------------------.------------------.
| 6 5 2 | 1 4 9 | 38 378 378 |
| 4 8 W37 |*357 367 2 | 56 9 1 |
| 1 W37 9 |*3578 36-78 5-7 | 56 2 4 |
:------------------+------------------+------------------:
| 357 347 45 | 9 2 6 | 38 1 378 |
| 9 6 W378 |*78 5 1 | 4 W37 2 |
| 2 1 78 | 4 78 3 | 9 6 5 |
:------------------+------------------+------------------:
| 357 347 45 | 2 9 8 | 1 35 6 |
| 358 9 1 | 6 37 57 | 2 4 38 |
| 358 2 6 | 35 1 4 | 7 358 9 |
'------------------'------------------'------------------'

this extended w-wing with group ending finishes it.
(7=3)r3c2 - (3)r2c3 = (3)r5c3 - (3=7)r5c8 - (7)r5c4 = (7)r23c4; r3c56 <> 7

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